CN113285209A - Small mobile terminal antenna supporting dual-mode coexistence - Google Patents
Small mobile terminal antenna supporting dual-mode coexistence Download PDFInfo
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- CN113285209A CN113285209A CN202110440464.4A CN202110440464A CN113285209A CN 113285209 A CN113285209 A CN 113285209A CN 202110440464 A CN202110440464 A CN 202110440464A CN 113285209 A CN113285209 A CN 113285209A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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Abstract
The invention discloses a miniaturized mobile terminal antenna supporting dual-mode coexistence, which comprises a dielectric substrate, a first feed network, a second feed network, a first antenna radiating unit and a second antenna radiating unit, wherein the first antenna radiating unit is positioned at the front side of the second antenna radiating unit, the first radiating unit and the second radiating unit are respectively composed of a plurality of metal conductors, the metal conductors are respectively and sequentially connected and distributed on different surfaces of the dielectric substrate to reduce the overall size of the antenna and improve the space utilization rate of the dielectric substrate and the mobile terminal, step impedance structures are formed inside the first antenna radiating unit and the second antenna radiating unit to realize the broadband and multiband characteristics of the antenna, a decoupling network is fixed to reduce the coupling between the first antenna radiating unit and the second antenna radiating unit, most of the metal conductors are in the same plane, the common PCB processing technology is adopted, and the batch production can be realized; the advantages are low profile and wide coverage band.
Description
Technical Field
The present invention relates to a mobile terminal antenna, and more particularly, to a miniaturized mobile terminal antenna supporting dual-mode coexistence.
Background
With the development of wireless communication technology, mobile terminals need to widely support various communication protocols such as 4G, 5G, Wi-Fi and meet increasing traffic demands. Under the background that 5G is not widely applied at present, the configuration on the mobile terminal can simultaneously support the simultaneous working of dual modes (such as 4G and 5G), and the Carrier Aggregation technology (Carrier Aggregation) is realized, so that the improvement of the transmission signal bandwidth has important significance.
In order to effectively improve the wireless communication capacity and the potential of the spectrum utilization rate required by the mobile terminal, a multiple-input multiple-output (MIMO) multiple-antenna technology is widely applied as a key technical means. The integration of more antenna elements into mobile terminals has become a necessary trend in mobile terminal antenna design. However, as the screen occupation ratio is increased, the number of internal devices is increased, and the engineering aesthetics are developed, the layout environment of the internal antenna of the mobile terminal is further deteriorated, and how to design the multi-element antenna system in the increasingly severe environment inside the mobile terminal becomes a great challenge. Meanwhile, with the gradual improvement of the 5G frequency band; the broadband characteristic of the mobile terminal antenna also becomes one of the important evaluation criteria for the antenna performance. In order to meet the requirements of broadband and miniaturization of mobile terminals, a compact multimode antenna has become a good solution.
The existing mobile terminal antenna mainly has two realization structures: the slot antenna structure is an antenna formed by slotting on a metal conductor plane, and has the design advantage of low profile because the slot antenna structure can be represented as a two-dimensional structure, but the bandwidth of the slot antenna structure is narrow, so that the slot antenna structure is limited in application of a broadband mobile terminal and cannot meet the requirements of multiple frequency bands of the mobile terminal antenna; PIFA structures are relatively small in size and have a wide operating band, but since a radiating plane in the PIFA structure itself needs to be above the plane of the floor, the PIFA structure has high requirements for the height of the application environment and the surrounding electrical environment, and it is difficult to meet the low-profile design requirements of the current mobile terminal antenna.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a miniaturized mobile terminal antenna which has low profile and wide coverage frequency band and supports dual-mode coexistence.
The technical scheme adopted by the invention for solving the technical problems is as follows: a miniaturized mobile terminal antenna supporting dual-mode coexistence comprises a dielectric substrate, a first feed network, a second feed network, a first antenna radiating unit and a second antenna radiating unit, wherein the dielectric substrate is a rectangular plate, and the first antenna radiating unit is positioned on the front side of the second antenna radiating unit; the first antenna radiating unit comprises a first rectangular metal conductor, a second rectangular metal conductor, a third rectangular metal conductor, a fourth rectangular metal conductor, a fifth rectangular metal conductor, a sixth rectangular metal conductor, a seventh rectangular metal conductor, an eighth rectangular metal conductor and a first isosceles right-angle triangular metal conductor, wherein the first rectangular metal conductor, the second rectangular metal conductor, the third rectangular metal conductor, the fourth rectangular metal conductor and the first isosceles right-angle triangular metal conductor are attached to the upper surface of the dielectric substrate, the plane of the front end face of the first rectangular metal conductor is positioned on the rear side of the plane of the front end face of the dielectric substrate, and the plane of the front end face of the first rectangular metal conductor is parallel to the plane of the front end face of the dielectric substrate, the second rectangular metal conductor is positioned on the left side of the first rectangular metal conductor, the front end surface of the second rectangular metal conductor is flush with the front end surface of the dielectric substrate, the rear end surface of the second rectangular metal conductor is flush with the rear end surface of the first rectangular metal conductor, the right end surface of the second rectangular metal conductor is connected with the left end surface of the first rectangular metal conductor and is in a joint state, the third rectangular metal conductor is positioned on the left side of the second rectangular metal conductor, the front end surface of the third rectangular metal conductor is flush with the front end surface of the second rectangular metal conductor, the right end surface of the third rectangular metal conductor is connected with the left end surface of the second rectangular metal conductor and is in a joint state, and the fourth rectangular metal conductor is positioned on the left side of the third rectangular metal conductor, the front end face of the fourth rectangular metal conductor is flush with the front end face of the third rectangular metal conductor, the right end face of the fourth rectangular metal conductor is connected with the left end face of the third rectangular metal conductor and is in a joint state, the left end face of the fourth rectangular metal conductor is flush with the left end face of the dielectric substrate, two adjacent right-angle side faces of the first isosceles right-angle triangular metal conductor are respectively connected with the left end face of the second rectangular metal conductor and the rear end face of the third rectangular metal conductor in a one-to-one correspondence mode and are in a joint state respectively, the plane where the rear end face of the fourth rectangular metal conductor is located on the rear side of the plane where the rear end face of the third rectangular metal conductor is located and the front side of the plane where the front end face of the first rectangular metal conductor is located, and the fifth rectangular metal conductor is attached to the front end face of the dielectric substrate, the lower end surface of the fifth rectangular metal conductor is flush with the lower end surface of the dielectric substrate, the upper end surface of the fifth rectangular metal conductor is flush with the upper end surface of the dielectric substrate, the left end surface of the fifth rectangular metal conductor is flush with the left end surface of the dielectric substrate, the sixth rectangular metal conductor is attached to the left end surface of the dielectric substrate, the lower end surface of the sixth rectangular metal conductor is flush with the lower end surface of the dielectric substrate, the upper end surface of the sixth rectangular metal conductor is flush with the upper end surface of the dielectric substrate, the front end surface of the sixth rectangular metal conductor is flush with the front end surface of the dielectric substrate, the seventh rectangular metal conductor and the eighth rectangular metal conductor are attached to the lower surface of the dielectric substrate, and the left end surface of the seventh rectangular metal conductor is flush with the left end surface of the dielectric substrate, the front end face of the seventh rectangular metal conductor is flush with the front end face of the dielectric substrate, the eighth rectangular metal conductor is positioned at the rear side of the seventh rectangular metal conductor, the left end face of the eighth rectangular metal conductor is flush with the left end face of the dielectric substrate, the front end face of the eighth rectangular metal conductor is connected with the rear end face of the seventh rectangular metal conductor, and the front end face of the eighth rectangular metal conductor and the rear end face of the seventh rectangular metal conductor are in a joint state; the length of the eighth rectangular metal conductor along the left-right direction is smaller than that of the seventh rectangular metal conductor along the left-right direction; the second antenna radiation unit is composed of a ninth rectangular metal conductor, a tenth rectangular metal conductor, an eleventh rectangular metal conductor, a twelfth rectangular metal conductor, a thirteenth rectangular metal conductor, a fourteenth rectangular metal conductor, a fifteenth rectangular metal conductor, a sixteenth rectangular metal conductor and a second isosceles right-angled triangular metal conductor, wherein the ninth rectangular metal conductor, the tenth rectangular metal conductor, the eleventh rectangular metal conductor, the twelfth rectangular metal conductor and the second isosceles right-angled triangular metal conductor are attached to the upper surface of the dielectric substrate, the plane of the rear end face of the ninth rectangular metal conductor is located on the front side of the plane of the rear end face of the dielectric substrate, and the plane of the rear end face of the ninth rectangular metal conductor is parallel to the plane of the rear end face of the dielectric substrate, the tenth rectangular metal conductor is positioned on the left side of the ninth rectangular metal conductor, the rear end face of the tenth rectangular metal conductor is flush with the rear end face of the dielectric substrate, the front end face of the tenth rectangular metal conductor is flush with the front end face of the ninth rectangular metal conductor, the right end face of the tenth rectangular metal conductor is connected with the left end face of the ninth rectangular metal conductor and is in a joint state, the eleventh rectangular metal conductor is positioned on the left side of the tenth rectangular metal conductor, the rear end face of the eleventh rectangular metal conductor is flush with the rear end face of the tenth rectangular metal conductor, the right end face of the eleventh rectangular metal conductor is connected with the left end face of the tenth rectangular metal conductor and is in a joint state, and the twelfth rectangular metal conductor is positioned on the left side of the eleventh rectangular metal conductor, the rear end face of the twelfth rectangular metal conductor is flush with the rear end face of the eleventh rectangular metal conductor, the right end face of the twelfth rectangular metal conductor is connected with the left end face of the eleventh rectangular metal conductor and in a joint state, the left end face of the twelfth rectangular metal conductor is flush with the left end face of the dielectric substrate, two adjacent right-angled side faces of the second isosceles right-angle triangular metal conductor are respectively connected with the left end face of the tenth rectangular metal conductor and the front end face of the eleventh rectangular metal conductor in a one-to-one correspondence and are in a joint state respectively, and the plane where the front end face of the twelfth rectangular metal conductor is located on the front side of the plane where the front end face of the eleventh rectangular metal conductor is located and on the rear side of the plane where the rear end face of the ninth rectangular metal conductor is located, the thirteenth rectangular metal conductor is attached to the rear end face of the dielectric substrate, the lower end face of the thirteenth rectangular metal conductor is flush with the lower end face of the dielectric substrate, the upper end face of the thirteenth rectangular metal conductor is flush with the upper end face of the dielectric substrate, the left end face of the thirteenth rectangular metal conductor is flush with the left end face of the dielectric substrate, the fourteenth rectangular metal conductor is attached to the left end face of the dielectric substrate, the lower end face of the fourteenth rectangular metal conductor is flush with the lower end face of the dielectric substrate, the upper end face of the fourteenth rectangular metal conductor is flush with the upper end face of the dielectric substrate, the rear end face of the fourteenth rectangular metal conductor is flush with the rear end face of the dielectric substrate, and the fifteenth rectangular metal conductor and the sixteenth rectangular metal conductor are attached to the lower surface of the dielectric substrate, the left end face of the fifteenth rectangular metal conductor is flush with the left end face of the dielectric substrate, the rear end face of the fifteenth rectangular metal conductor is flush with the rear end face of the dielectric substrate, the sixteenth rectangular metal conductor is positioned on the front side of the fifteenth rectangular metal conductor, the left end face of the sixteenth rectangular metal conductor is flush with the left end face of the dielectric substrate, the rear end face of the sixteenth rectangular metal conductor is connected with the front end face of the fifteenth rectangular metal conductor, and the sixteenth rectangular metal conductor and the fifteenth rectangular metal conductor are in a joint state; the length of the sixteenth rectangular metal conductor along the left-right direction is less than that of the fifteenth rectangular metal conductor along the left-right direction; the first feed network is used for impedance matching and decoupling the first antenna radiating unit, the first feed network is connected with the first rectangular metal conductor, the second feed network is used for impedance matching and decoupling the second antenna radiating unit, and the second feed network is connected with the ninth rectangular metal conductor.
The first feed network and the second feed network are respectively composed of tunable components and radio frequency circuits.
The length of the dielectric substrate along the left-right direction is 50mm, the length of the dielectric substrate along the front-back direction is 20mm, the height of the dielectric substrate is 1.5mm, the length of the first rectangular metal conductor along the left-right direction is 1.5mm, and the length of the first rectangular metal conductor along the front-back direction is 1 mm; the length of the second rectangular metal conductor along the left-right direction is 1mm, and the length of the second rectangular metal conductor along the front-back direction is 9 mm; the length of the third rectangular metal conductor along the left-right direction is 11mm, and the length of the third rectangular metal conductor along the front-back direction is 1 mm; the length of the fourth rectangular metal conductor along the left-right direction is 1.5mm, and the length of the fourth rectangular metal conductor along the front-back direction is 3 mm; the length of the fifth rectangular metal conductor along the left-right direction is 1.5mm, and the length of the fifth rectangular metal conductor along the front-back direction is 1 mm; the length of the sixth rectangular metal conductor along the front-back direction is 9mm, and the length along the left-right direction is 1 mm; the length of the seventh rectangular metal conductor along the left-right direction is 11mm, and the length along the front-back direction is 1 mm; the length of the eighth rectangular metal conductor along the left-right direction is 1.5mm, and the length of the eighth rectangular metal conductor along the front-back direction is 4 mm; the ninth rectangular metal conductor is 7mm long in the left-right direction and 1.5mm long in the up-down direction; the length of the tenth rectangular metal conductor along the vertical direction is 1.5mm, and the length of the tenth rectangular metal conductor along the front-back direction is 3 mm; the length of the eleventh rectangular metal conductor along the left-right direction is 7mm, and the length along the front-back direction is 1 mm; the length of the twelfth rectangular metal conductor along the left-right direction is 1.5mm, and the length of the twelfth rectangular metal conductor along the front-back direction is 4 mm; the length of the thirteenth rectangular metal conductor along the front-back direction is 4mm, and the length of the thirteenth rectangular metal conductor along the up-down direction is 1.5 mm; the length of the fourteenth rectangular metal conductor along the left-right direction is 7mm, and the length of the fourteenth rectangular metal conductor along the up-down direction is 1.5 mm; the length of the fifteenth rectangular metal conductor along the left-right direction is 1mm, and the length of the fifteenth rectangular metal conductor along the front-back direction is 3 mm; the sixteenth rectangular metal conductor is 7mm long in the left-right direction and 1mm long in the front-back direction; the length of the right-angle side surface of the first isosceles right-angle triangular metal conductor is 4mm, and the length of the right-angle side surface of the second isosceles right-angle triangular metal conductor is 3 mm.
Compared with the prior art, the invention has the advantages that ten metal conductors, namely a first rectangular metal conductor, a second rectangular metal conductor, a third rectangular metal conductor, a fourth rectangular metal conductor, a fifth rectangular metal conductor, a sixth rectangular metal conductor, a seventh rectangular metal conductor, an eighth rectangular metal conductor and a first isosceles right-angle triangular metal conductor, are adopted to form the first antenna radiation unit, ten metal conductors, namely a plurality of metal conductors, namely a ninth rectangular metal conductor, a tenth rectangular metal conductor, an eleventh rectangular metal conductor, a twelfth rectangular metal conductor, a thirteenth rectangular metal conductor, a fourteenth rectangular metal conductor, a fifteenth rectangular metal conductor, a sixteenth rectangular metal conductor and a second isosceles right-angle triangular metal conductor are adopted to form the second antenna radiation unit, and the metal conductors are respectively connected and distributed on different surfaces of the dielectric substrate in sequence to reduce the overall size of the antenna, the space utilization rate of the dielectric substrate and the mobile terminal is improved, so that the miniaturization and the low profile of the antenna are realized, the structures of the second rectangular metal conductor and the first triangular metal conductor as well as the structures of the sixth rectangular metal conductor and the second triangular metal conductor form a step impedance structure to realize the broadband and multiband characteristics of the antenna, the first rectangular metal conductor and the fifth rectangular metal conductor are adopted as a solid decoupling network at the input end of the antenna to reduce the coupling between the first antenna radiation unit and the second antenna radiation unit, so that the radiation efficiency of the antenna is improved, and the multi-mode switching and the lower coupling can be realized by loading an external tunable impedance matching network; in the aspect of processing, because most of the metal conductors are in the same plane, the processing technology is simple, and the mass production can be realized by adopting the common PCB processing technology, so that the cost is further reduced.
Drawings
Fig. 1 is a perspective view of a miniaturized mobile terminal antenna supporting dual mode coexistence according to the present invention;
fig. 2 is a top view of a miniaturized mobile terminal antenna supporting dual mode coexistence according to the present invention;
fig. 3 is a bottom view of a miniaturized mobile terminal antenna supporting dual mode coexistence according to the present invention;
fig. 4 is a front view of an antenna for a miniaturized mobile terminal supporting dual mode coexistence according to the present invention;
fig. 5 is a rear view of a miniaturized mobile terminal antenna supporting dual mode coexistence according to the present invention;
fig. 6 is a left side view of an antenna for a miniaturized mobile terminal supporting dual mode coexistence according to the present invention;
fig. 7 is an exploded view of a miniaturized mobile terminal antenna supporting dual mode coexistence according to the present invention;
fig. 8 is an S parameter simulation diagram of a miniaturized mobile terminal antenna supporting dual mode coexistence according to the present invention;
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Example (b): as shown in fig. 1 to 7, a miniaturized mobile terminal antenna supporting dual-mode coexistence includes a dielectric substrate 1, a first feeding network 2, a second feeding network 3, a first antenna radiating element and a second antenna radiating element, where the dielectric substrate 1 is a rectangular plate; the first antenna radiating unit is composed of a first rectangular metal conductor 4, a second rectangular metal conductor 5, a third rectangular metal conductor 6, a fourth rectangular metal conductor 7, a fifth rectangular metal conductor 8, a sixth rectangular metal conductor 9, a seventh rectangular metal conductor 10, an eighth rectangular metal conductor 11 and a first isosceles right-angle triangular metal conductor 12, wherein the first rectangular metal conductor 4, the second rectangular metal conductor 5, the third rectangular metal conductor 6, the fourth rectangular metal conductor 7 and the first isosceles right-angle triangular metal conductor 12 are attached to the upper surface of the dielectric substrate 1, the plane of the front end face of the first rectangular metal conductor 4 is positioned at the rear side of the plane of the front end face of the dielectric substrate 1, the plane of the front end face of the first rectangular metal conductor 4 is parallel to the plane of the front end face of the dielectric substrate 1, the second rectangular metal conductor 5 is positioned at the left side of the first rectangular metal conductor 4, the front end face of the second rectangular metal conductor 5 is flush with the front end face of the dielectric substrate 1, the rear end face of the second rectangular metal conductor 5 is flush with the rear end face of the first rectangular metal conductor 4, the right end face of the second rectangular metal conductor 5 is connected with the left end face of the first rectangular metal conductor 4 and is in a joint state, the third rectangular metal conductor 6 is positioned on the left side of the second rectangular metal conductor 5, the front end face of the third rectangular metal conductor 6 is flush with the front end face of the second rectangular metal conductor 5, the right end face of the third rectangular metal conductor 6 is connected with the left end face of the second rectangular metal conductor 5 and is in a joint state, the fourth rectangular metal conductor 7 is positioned on the left side of the third rectangular metal conductor 6, the front end face of the fourth rectangular metal conductor 7 is flush with the front end face of the third rectangular metal conductor 6, the right end face of the fourth rectangular metal conductor 7 is connected with the left end face of the third rectangular metal conductor 6 and is in a joint state, the left end face of the fourth rectangular metal conductor 7 is flush with the left end face of the dielectric substrate 1, two adjacent right-angle side faces of the first isosceles right-angle triangular metal conductor 12 are respectively connected with the left end face of the second rectangular metal conductor 5 and the rear end face of the third rectangular metal conductor 6 in a one-to-one correspondence manner and are respectively in a joint state, the plane where the rear end face of the fourth rectangular metal conductor 7 is located is positioned on the rear side of the plane where the rear end face of the third rectangular metal conductor 6 is located and on the front side of the plane where the front end face of the first rectangular metal conductor 4 is located, the fifth rectangular metal conductor 8 is attached to the front end face of the dielectric substrate 1, the lower end face of the fifth rectangular metal conductor 8 is flush with the lower end face of the dielectric substrate 1, the upper end face of the fifth rectangular metal conductor 8 is flush with the upper end face of the dielectric substrate 1, the left end face of the fifth rectangular metal conductor 8 is flush with, a sixth rectangular metal conductor 9 is attached to the left end face of the dielectric substrate 1, the lower end face of the sixth rectangular metal conductor 9 is flush with the lower end face of the dielectric substrate 1, the upper end face of the sixth rectangular metal conductor 9 is flush with the upper end face of the dielectric substrate 1, the front end face of the sixth rectangular metal conductor 9 is flush with the front end face of the dielectric substrate 1, a seventh rectangular metal conductor 10 and an eighth rectangular metal conductor 11 are attached to the lower surface of the dielectric substrate 1, the left end face of the seventh rectangular metal conductor 10 is flush with the left end face of the dielectric substrate 1, the front end face of the seventh rectangular metal conductor 10 is flush with the front end face of the dielectric substrate 1, the eighth rectangular metal conductor 11 is located at the rear side of the seventh rectangular metal conductor 10, the left end face of the eighth rectangular metal conductor 11 is flush with the left end face of the dielectric substrate 1, the front end face of the eighth rectangular metal conductor 11 is connected with the rear end face of the seventh rectangular metal conductor 10, and the eighth rectangular metal conductor and the seventh rectangular metal conductor 10 are in a joint state; the length of the eighth rectangular metal conductor 11 in the left-right direction is smaller than the length of the seventh rectangular metal conductor 10 in the left-right direction; the second antenna radiation element is composed of a ninth rectangular metal conductor 13, a tenth rectangular metal conductor 14, an eleventh rectangular metal conductor 15, a twelfth rectangular metal conductor 16, a thirteenth rectangular metal conductor 17, a fourteenth rectangular metal conductor 18, a fifteenth rectangular metal conductor 19, a sixteenth rectangular metal conductor 20 and a second isosceles right-angle triangular metal conductor 21, the ninth rectangular metal conductor 13, the tenth rectangular metal conductor 14, the eleventh rectangular metal conductor 15, the twelfth rectangular metal conductor 16 and the second isosceles right-angle triangular metal conductor 21 are attached to the upper surface of the dielectric substrate 1, the plane of the rear end face of the ninth rectangular metal conductor 13 is located on the front side of the plane of the rear end face of the dielectric substrate 1, the plane of the rear end face of the ninth rectangular metal conductor 13 is parallel to the plane of the rear end face of the dielectric substrate 1, the tenth rectangular metal conductor 14 is located on the left side of the ninth rectangular metal conductor 13, the rear end face of the tenth rectangular metal conductor 14 is flush with the rear end face of the dielectric substrate 1, the front end face of the tenth rectangular metal conductor 14 is flush with the front end face of the ninth rectangular metal conductor 13, the right end face of the tenth rectangular metal conductor 14 is connected with the left end face of the ninth rectangular metal conductor 13 and is in a joint state, the eleventh rectangular metal conductor 15 is positioned on the left side of the tenth rectangular metal conductor 14, the rear end face of the eleventh rectangular metal conductor 15 is flush with the rear end face of the tenth rectangular metal conductor 14, the right end face of the eleventh rectangular metal conductor 15 is connected with the left end face of the tenth rectangular metal conductor 14 and is in a joint state, the twelfth rectangular metal conductor 16 is positioned on the left side of the eleventh rectangular metal conductor 15, the rear end face of the twelfth rectangular metal conductor 16 is flush with the rear end face of the eleventh rectangular metal conductor 15, the right end face of the twelfth rectangular metal conductor 16 is connected with the left end face of the eleventh rectangular metal conductor 15 and is in a joint state, the left end face of the twelfth rectangular metal conductor 16 is flush with the left end face of the dielectric substrate 1, two adjacent right-angle side faces of the second isosceles right triangular metal conductor 21 are respectively connected with the left end face of the tenth rectangular metal conductor 14 and the front end face of the eleventh rectangular metal conductor 15 in a one-to-one correspondence and are respectively in a laminating state, the plane where the front end face of the twelfth rectangular metal conductor 16 is located is positioned on the front side of the plane where the front end face of the eleventh rectangular metal conductor 15 is located and the rear side of the plane where the rear end face of the ninth rectangular metal conductor 13 is located, the thirteenth rectangular metal conductor 17 is attached to the rear end face of the dielectric substrate 1, the lower end face of the thirteenth rectangular metal conductor 17 is flush with the lower end face of the dielectric substrate 1, the upper end face of the thirteenth rectangular metal conductor 17 is flush with the upper end face of the dielectric substrate 1, the left end face of the thirteenth rectangular metal conductor 17 is flush with the left end face of the dielectric substrate 1, a fourteenth rectangular metal conductor 18 is attached to the left end face of the dielectric substrate 1, the lower end face of the fourteenth rectangular metal conductor 18 is flush with the lower end face of the dielectric substrate 1, the upper end face of the fourteenth rectangular metal conductor 18 is flush with the upper end face of the dielectric substrate 1, the rear end face of the fourteenth rectangular metal conductor 18 is flush with the rear end face of the dielectric substrate 1, a fifteenth rectangular metal conductor 19 and a sixteenth rectangular metal conductor 20 are attached to the lower surface of the dielectric substrate 1, the left end face of the fifteenth rectangular metal conductor 19 is flush with the left end face of the dielectric substrate 1, the rear end face of the fifteenth rectangular metal conductor 19 is flush with the rear end face of the dielectric substrate 1, the sixteenth rectangular metal conductor 20 is located at the front side of the fifteenth rectangular metal conductor 19, the left end face of the sixteenth rectangular metal conductor 20 is flush with the left end face of the dielectric substrate 1, the rear end face of the sixteenth rectangular metal conductor 20 is connected with the front end face of the fifteenth rectangular metal conductor 19, and the sixteenth rectangular metal conductor 20 and the sixteenth rectangular metal conductor are in a joint state; the length of the sixteenth rectangular metal conductor 20 in the left-right direction is smaller than the length of the fifteenth rectangular metal conductor 19 in the left-right direction; the first feed network 2 is used for impedance matching and decoupling the first antenna radiating element, the first feed network 2 is connected with the first rectangular metal conductor 4, the second feed network 3 is used for impedance matching and decoupling the second antenna radiating element, and the second feed network 3 is connected with the ninth rectangular metal conductor 13.
In this embodiment, the first feed network 2 and the second feed network 3 are respectively composed of tunable devices and radio frequency circuits.
In this embodiment, the length of the dielectric substrate 1 in the left-right direction is 50mm, the length in the front-back direction is 20mm, and the height is 1.5mm, the length of the first rectangular metal conductor 4 in the left-right direction is 1.5mm, and the length in the front-back direction is 1 mm; the length of the second rectangular metal conductor 5 in the left-right direction is 1mm, and the length in the front-back direction is 9 mm; the length of the third rectangular metal conductor 6 in the left-right direction is 11mm, and the length in the front-back direction is 1 mm; the length of the fourth rectangular metal conductor 7 in the left-right direction is 1.5mm, and the length in the front-back direction is 3 mm; the length of the fifth rectangular metal conductor 8 in the left-right direction is 1.5mm, and the length in the front-back direction is 1 mm; the length of the sixth rectangular metal conductor 9 in the front-back direction is 9mm, and the length in the left-right direction is 1 mm; the length of the seventh rectangular metal conductor 10 in the left-right direction is 11mm, and the length in the front-rear direction is 1 mm; the length of the eighth rectangular metal conductor 11 in the left-right direction is 1.5mm, and the length in the front-back direction is 4 mm; the ninth rectangular metal conductor 13 has a length of 7mm in the left-right direction and a length of 1.5mm in the up-down direction; the length of the tenth rectangular metal conductor 14 in the up-down direction is 1.5mm, and the length in the front-rear direction is 3 mm; the eleventh rectangular metal conductor 15 has a length of 7mm in the left-right direction and a length of 1mm in the front-rear direction; the twelfth rectangular metal conductor 16 has a length of 1.5mm in the left-right direction and a length of 4mm in the front-rear direction; the thirteenth rectangular metal conductor 17 has a length of 4mm in the front-rear direction and 1.5mm in the up-down direction; the fourteenth rectangular metal conductor 18 has a length of 7mm in the left-right direction and 1.5mm in the up-down direction; the fifteenth rectangular metal conductor 19 has a length of 1mm in the left-right direction and a length of 3mm in the front-rear direction; the sixteenth rectangular metal conductor 20 has a length of 7mm in the left-right direction and a length of 1m in the front-rear direction; the length of the right-angle side of the first isosceles right-angle triangular metal conductor 12 is 4mm, and the length of the right-angle side of the second isosceles right-angle triangular metal conductor 21 is 3 mm.
Performing S-parameter simulation on the antenna structure of the miniaturized mobile terminal supporting dual-mode coexistence according to the embodiment by using HFSS (electromagnetic simulation software), wherein an S-parameter simulation diagram is shown in fig. 8, wherein a frequency sweep range is 1.5GHz-7.5 GHz; analysis of FIG. 8 reveals that: the miniaturized mobile terminal antenna supporting dual-mode coexistence can respectively cover three target communication frequency bands (2.3-2.4GHz, 2.4-2.5GHz and 2.5-2.7GHz) in a tunable working frequency band of a low frequency band, cover 4.5-6GHz in a high frequency band broadband, and has a reflection coefficient lower than-6 dB; the coupling coefficient is lower than-10 dB.
In summary, the miniaturized mobile terminal antenna supporting dual-mode coexistence according to the present invention can achieve the design objectives of low profile, miniaturization and broadband, the thickness of the miniaturized mobile terminal antenna is only the thickness of a single-layer dielectric substrate, and the overall size of the antenna can be further reduced by the layout of the two sides and the side surface of the metal conductor, so as to improve the space utilization of the dielectric substrate and the mobile terminal. In the aspect of processing, as most of the metal conductors are in the same plane, the processing technology is simpler, and only a common PCB processing technology is adopted, so that the cost is further reduced.
Claims (3)
1. A miniaturized mobile terminal antenna supporting dual-mode coexistence is characterized by comprising a dielectric substrate, a first feed network, a second feed network, a first antenna radiating unit and a second antenna radiating unit, wherein the dielectric substrate is a rectangular plate, and the first antenna radiating unit is positioned on the front side of the second antenna radiating unit;
the first antenna radiating unit comprises a first rectangular metal conductor, a second rectangular metal conductor, a third rectangular metal conductor, a fourth rectangular metal conductor, a fifth rectangular metal conductor, a sixth rectangular metal conductor, a seventh rectangular metal conductor, an eighth rectangular metal conductor and a first isosceles right-angle triangular metal conductor, wherein the first rectangular metal conductor, the second rectangular metal conductor, the third rectangular metal conductor, the fourth rectangular metal conductor and the first isosceles right-angle triangular metal conductor are attached to the upper surface of the dielectric substrate, the plane of the front end face of the first rectangular metal conductor is positioned on the rear side of the plane of the front end face of the dielectric substrate, and the plane of the front end face of the first rectangular metal conductor is parallel to the plane of the front end face of the dielectric substrate, the second rectangular metal conductor is positioned on the left side of the first rectangular metal conductor, the front end surface of the second rectangular metal conductor is flush with the front end surface of the dielectric substrate, the rear end surface of the second rectangular metal conductor is flush with the rear end surface of the first rectangular metal conductor, the right end surface of the second rectangular metal conductor is connected with the left end surface of the first rectangular metal conductor and is in a joint state, the third rectangular metal conductor is positioned on the left side of the second rectangular metal conductor, the front end surface of the third rectangular metal conductor is flush with the front end surface of the second rectangular metal conductor, the right end surface of the third rectangular metal conductor is connected with the left end surface of the second rectangular metal conductor and is in a joint state, and the fourth rectangular metal conductor is positioned on the left side of the third rectangular metal conductor, the front end face of the fourth rectangular metal conductor is flush with the front end face of the third rectangular metal conductor, the right end face of the fourth rectangular metal conductor is connected with the left end face of the third rectangular metal conductor and is in a joint state, the left end face of the fourth rectangular metal conductor is flush with the left end face of the dielectric substrate, two adjacent right-angle side faces of the first isosceles right-angle triangular metal conductor are respectively connected with the left end face of the second rectangular metal conductor and the rear end face of the third rectangular metal conductor in a one-to-one correspondence mode and are in a joint state respectively, the plane where the rear end face of the fourth rectangular metal conductor is located on the rear side of the plane where the rear end face of the third rectangular metal conductor is located and the front side of the plane where the front end face of the first rectangular metal conductor is located, and the fifth rectangular metal conductor is attached to the front end face of the dielectric substrate, the lower end surface of the fifth rectangular metal conductor is flush with the lower end surface of the dielectric substrate, the upper end surface of the fifth rectangular metal conductor is flush with the upper end surface of the dielectric substrate, the left end surface of the fifth rectangular metal conductor is flush with the left end surface of the dielectric substrate, the sixth rectangular metal conductor is attached to the left end surface of the dielectric substrate, the lower end surface of the sixth rectangular metal conductor is flush with the lower end surface of the dielectric substrate, the upper end surface of the sixth rectangular metal conductor is flush with the upper end surface of the dielectric substrate, the front end surface of the sixth rectangular metal conductor is flush with the front end surface of the dielectric substrate, the seventh rectangular metal conductor and the eighth rectangular metal conductor are attached to the lower surface of the dielectric substrate, and the left end surface of the seventh rectangular metal conductor is flush with the left end surface of the dielectric substrate, the front end face of the seventh rectangular metal conductor is flush with the front end face of the dielectric substrate, the eighth rectangular metal conductor is positioned at the rear side of the seventh rectangular metal conductor, the left end face of the eighth rectangular metal conductor is flush with the left end face of the dielectric substrate, the front end face of the eighth rectangular metal conductor is connected with the rear end face of the seventh rectangular metal conductor, and the front end face of the eighth rectangular metal conductor and the rear end face of the seventh rectangular metal conductor are in a joint state; the length of the eighth rectangular metal conductor along the left-right direction is smaller than that of the seventh rectangular metal conductor along the left-right direction;
the second antenna radiation unit is composed of a ninth rectangular metal conductor, a tenth rectangular metal conductor, an eleventh rectangular metal conductor, a twelfth rectangular metal conductor, a thirteenth rectangular metal conductor, a fourteenth rectangular metal conductor, a fifteenth rectangular metal conductor, a sixteenth rectangular metal conductor and a second isosceles right-angled triangular metal conductor, wherein the ninth rectangular metal conductor, the tenth rectangular metal conductor, the eleventh rectangular metal conductor, the twelfth rectangular metal conductor and the second isosceles right-angled triangular metal conductor are attached to the upper surface of the dielectric substrate, the plane of the rear end face of the ninth rectangular metal conductor is located on the front side of the plane of the rear end face of the dielectric substrate, and the plane of the rear end face of the ninth rectangular metal conductor is parallel to the plane of the rear end face of the dielectric substrate, the tenth rectangular metal conductor is positioned on the left side of the ninth rectangular metal conductor, the rear end face of the tenth rectangular metal conductor is flush with the rear end face of the dielectric substrate, the front end face of the tenth rectangular metal conductor is flush with the front end face of the ninth rectangular metal conductor, the right end face of the tenth rectangular metal conductor is connected with the left end face of the ninth rectangular metal conductor and is in a joint state, the eleventh rectangular metal conductor is positioned on the left side of the tenth rectangular metal conductor, the rear end face of the eleventh rectangular metal conductor is flush with the rear end face of the tenth rectangular metal conductor, the right end face of the eleventh rectangular metal conductor is connected with the left end face of the tenth rectangular metal conductor and is in a joint state, and the twelfth rectangular metal conductor is positioned on the left side of the eleventh rectangular metal conductor, the rear end face of the twelfth rectangular metal conductor is flush with the rear end face of the eleventh rectangular metal conductor, the right end face of the twelfth rectangular metal conductor is connected with the left end face of the eleventh rectangular metal conductor and in a joint state, the left end face of the twelfth rectangular metal conductor is flush with the left end face of the dielectric substrate, two adjacent right-angled side faces of the second isosceles right-angle triangular metal conductor are respectively connected with the left end face of the tenth rectangular metal conductor and the front end face of the eleventh rectangular metal conductor in a one-to-one correspondence and are in a joint state respectively, and the plane where the front end face of the twelfth rectangular metal conductor is located on the front side of the plane where the front end face of the eleventh rectangular metal conductor is located and on the rear side of the plane where the rear end face of the ninth rectangular metal conductor is located, the thirteenth rectangular metal conductor is attached to the rear end face of the dielectric substrate, the lower end face of the thirteenth rectangular metal conductor is flush with the lower end face of the dielectric substrate, the upper end face of the thirteenth rectangular metal conductor is flush with the upper end face of the dielectric substrate, the left end face of the thirteenth rectangular metal conductor is flush with the left end face of the dielectric substrate, the fourteenth rectangular metal conductor is attached to the left end face of the dielectric substrate, the lower end face of the fourteenth rectangular metal conductor is flush with the lower end face of the dielectric substrate, the upper end face of the fourteenth rectangular metal conductor is flush with the upper end face of the dielectric substrate, the rear end face of the fourteenth rectangular metal conductor is flush with the rear end face of the dielectric substrate, and the fifteenth rectangular metal conductor and the sixteenth rectangular metal conductor are attached to the lower surface of the dielectric substrate, the left end face of the fifteenth rectangular metal conductor is flush with the left end face of the dielectric substrate, the rear end face of the fifteenth rectangular metal conductor is flush with the rear end face of the dielectric substrate, the sixteenth rectangular metal conductor is positioned on the front side of the fifteenth rectangular metal conductor, the left end face of the sixteenth rectangular metal conductor is flush with the left end face of the dielectric substrate, the rear end face of the sixteenth rectangular metal conductor is connected with the front end face of the fifteenth rectangular metal conductor, and the sixteenth rectangular metal conductor and the fifteenth rectangular metal conductor are in a joint state; the length of the sixteenth rectangular metal conductor along the left-right direction is less than that of the fifteenth rectangular metal conductor along the left-right direction;
the first feed network is used for impedance matching and decoupling the first antenna radiating unit, the first feed network is connected with the first rectangular metal conductor, the second feed network is used for impedance matching and decoupling the second antenna radiating unit, and the second feed network is connected with the ninth rectangular metal conductor.
2. The miniaturized mobile terminal antenna supporting dual-mode coexistence as claimed in claim 1, wherein the first feeding network and the second feeding network are respectively composed of tunable devices and radio frequency circuits.
3. The antenna for a miniaturized mobile terminal supporting dual-mode coexistence as claimed in claim 1, wherein said dielectric substrate has a length of 50mm in the left-right direction, a length of 20mm in the front-back direction, and a height of 1.5mm, said first rectangular metal conductor has a length of 1.5mm in the left-right direction, and a length of 1mm in the front-back direction; the length of the second rectangular metal conductor along the left-right direction is 1mm, and the length of the second rectangular metal conductor along the front-back direction is 9 mm; the length of the third rectangular metal conductor along the left-right direction is 11mm, and the length of the third rectangular metal conductor along the front-back direction is 1 mm; the length of the fourth rectangular metal conductor along the left-right direction is 1.5mm, and the length of the fourth rectangular metal conductor along the front-back direction is 3 mm; the length of the fifth rectangular metal conductor along the left-right direction is 1.5mm, and the length of the fifth rectangular metal conductor along the front-back direction is 1 mm; the length of the sixth rectangular metal conductor along the front-back direction is 9mm, and the length along the left-right direction is 1 mm; the length of the seventh rectangular metal conductor along the left-right direction is 11mm, and the length along the front-back direction is 1 mm; the length of the eighth rectangular metal conductor along the left-right direction is 1.5mm, and the length of the eighth rectangular metal conductor along the front-back direction is 4 mm; the ninth rectangular metal conductor is 7mm long in the left-right direction and 1.5mm long in the up-down direction; the length of the tenth rectangular metal conductor along the vertical direction is 1.5mm, and the length of the tenth rectangular metal conductor along the front-back direction is 3 mm; the length of the eleventh rectangular metal conductor along the left-right direction is 7mm, and the length along the front-back direction is 1 mm; the length of the twelfth rectangular metal conductor along the left-right direction is 1.5mm, and the length of the twelfth rectangular metal conductor along the front-back direction is 4 mm; the length of the thirteenth rectangular metal conductor along the front-back direction is 4mm, and the length of the thirteenth rectangular metal conductor along the up-down direction is 1.5 mm; the length of the fourteenth rectangular metal conductor along the left-right direction is 7mm, and the length of the fourteenth rectangular metal conductor along the up-down direction is 1.5 mm; the length of the fifteenth rectangular metal conductor along the left-right direction is 1mm, and the length of the fifteenth rectangular metal conductor along the front-back direction is 3 mm; the sixteenth rectangular metal conductor is 7mm long in the left-right direction and 1m long in the front-back direction; the length of the right-angle side surface of the first isosceles right-angle triangular metal conductor is 4mm, and the length of the right-angle side surface of the second isosceles right-angle triangular metal conductor is 3 mm.
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