CN103095314B - CMMB receives terminal - Google Patents
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- CN103095314B CN103095314B CN201110331048.7A CN201110331048A CN103095314B CN 103095314 B CN103095314 B CN 103095314B CN 201110331048 A CN201110331048 A CN 201110331048A CN 103095314 B CN103095314 B CN 103095314B
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Abstract
The present invention relates to a kind of CMMB and receive terminal, it includes CMMB and receives terminal body and the antenna conducted signal transmission, described antenna is Super-material antenna, it includes medium substrate, metal structure, feeder line and reference ground, described feeder line and described metal structure intercouple, described including being positioned at the first of relative two surfaces of described medium substrate with reference to ground unit and second with reference to ground unit with reference to ground, described first makes one end of described feeder line form microstrip line with reference to ground unit.CMMB of the present invention receives microstrip line described in the terminal topographic morphologies by critically control Super-material antenna metal structure and rational deployment, just the effective dielectric constant and the pcrmeability distribution that need are obtained, enable the antenna to enough in working frequency range, realize impedance matching preferably, completing energy conversion expeditiously, and obtain desirable radiation pattern, gain is high, in addition, it is little that described antenna takies volume, thus the overall volume that CMMB receives terminal is little, and environmental requirement is low.
Description
Technical field
The present invention relates to wireless access terminal equipment technical field, particularly relate to a kind of CMMB and receive terminal.
Background technology
CMMB full name ChinaMobileMultimediaBroadcasting, it may be assumed that China Mobile multimedia broadcasting.CMMB is mainly directed towards the small screen Handheld terminal, its end product kind mainly includes MP4, MP5, mobile phone, GPS, USB reception rod, independent receivers etc., there is provided digital broadcast television program, integrated information and urgent broadcast service, it is achieved satellite transmits the seamless collaborative covering combined with ground network.CMMB adopts the mobile multimedia broadcast television technology with independent intellectual property right, system can run, can safeguard, can manage, possess broadcast type, reversible service function, support the transportation that central and local governments combine, possess encryption authorization and control management system, support unified standard and unified operation, support the roaming of the user whole nation.
Current CMMB receives the television antenna of terminal and generally adopts external collapsible mast to realize, however collapsible mast due to price, unsightly and many reasons such as external easy damage exist, therefore, built-in CMMB antenna is applied in CMMB gradually and receives in terminal.Owing to CMMB ground base station U wave band requires band limits 474-798Mhz, so existing CMMB built-in aerial required size is difficult to be full of this band requirement, built-in aerial receiving ability is far weaker than external antenna.Especially the relatively low-frequency range 474-562Mhz band limits of CMMB, is always up the difficult point of Antenna Design, even collapsible mast also is difficult to reach satisfied reception index in this frequency range.At present, in order to solve this problem, also signal that built-in CMMB antenna lost by LNA circuit module compensates to have some schemes to be loaded with, but antenna own bandwidth is required significantly high by such design, namely CMMB antenna size there are certain needs equally, LNA is also exaggerated noise signal while amplifying signal, has some frequencies to exist and is flooded possibility by noise, is degrading CMMB receiving ability on the contrary.Therefore, how to solve the above-mentioned existing CMMB defect received existing for terminal and become problem demanding prompt solution.
Summary of the invention
The technical problem to be solved is in that, for above-mentioned the deficiencies in the prior art, propose a kind of CMMB and receive terminal, the antenna that this CMMB receives terminal is low to environmental requirement, gain is high, it is possible to realize impedance matching preferably in working frequency range, completes energy conversion expeditiously, and obtaining desirable radiation pattern, it is little that this CMMB receives terminal overall volume.
The technical solution adopted for the present invention to solve the technical problems is, propose a kind of CMMB and receive terminal, it includes CMMB and receives terminal body and be arranged on the described CMMB antenna receiving in terminal body and conducting signal transmission, described antenna includes medium substrate, metal structure, feeder line and reference ground, described metal structure, feeder line and with reference to be placed on described medium substrate, described feeder line and described metal structure intercouple, described the first reference ground unit and the second reference ground unit including with reference to ground being positioned at relative two surfaces of described medium substrate, described first makes one end of described feeder line form microstrip line with reference to ground unit.
Further, described CMMB receives terminal body and includes front end signal pretreatment module, baseband signal processing module and display module, described front end signal pretreatment module includes the tuner unit of order electrical connection, demodulating unit and UAM condition reception unit, described tuner unit is connected with described antenna electric, described UAM condition reception unit electrically connects with described baseband signal processing module, and described tuner unit, demodulating unit and UAM condition reception unit are respectively used to signal, the channel solution mediation program decryption that reception sends from antenna；Described baseband signal processing module has been used for communication protocol stack process, system administration and multi-media processing；Described display module is for showing, by the information after baseband signal processing module processes, discernible information of being grown up.
Further, described medium substrate is provided with some plated-through holes, and described first realizes electrically connecting by described plated-through hole with reference to ground unit with described second with reference to ground unit.
Further, described first is provided with, with reference to ground unit, the first metal covering unit and the second metal covering unit that are electrically connected to each other, and described first metal covering unit is relative with an end position of described feeder line, makes one end of described feeder line form described microstrip line；Described second is provided with the 3rd metal covering unit with reference to ground unit, and described 3rd metal covering unit is relative with described second metal covering cell position.
Further, described medium substrate is positioned at described second metal covering unit and described 3rd metal covering unit place offers some plated-through holes, and described second metal covering unit is electrically connected by described plated-through hole with described 3rd metal covering unit.
Further, described 3rd metal covering unit is positioned at one end of described metal structure, and described 3rd metal covering unit is long side tabular, and identical with the bearing of trend of described feeder line.
Further, described second is additionally provided with the 4th metal covering unit with reference to ground unit, and described 4th metal covering unit is positioned at the side of described feeder line one end, and is positioned on the bearing of trend of described feeder line.
Further, described medium substrate is positioned at described first metal covering unit and described 4th metal covering unit place offers some plated-through holes, and described first metal covering unit is electrically connected by described plated-through hole with described 4th metal covering unit.
Further, described metal structure be complementary opening resonance loop structure, complementary helix structure, opening helical ring structure, dual openings helical ring structure, complementary folding line structure, the derived structure of complementary opening resonance loop structure, complementary opening resonance loop structure compound after any one in structure after structure, complementary opening resonance loop structure group battle array.
Further, described metal structure is provided with framework and is positioned at two helixes of described framework, and described two helixes are interconnected to form opening helical ring, and described opening helical ring is connected with described framework, and the free end of described helix is panel shape.
In sum, CMMB of the present invention receives microstrip line described in the terminal topographic morphologies by critically control antenna metal structure and rational deployment, just obtain the effective dielectric constant and the pcrmeability distribution that need, enable the antenna to enough in working frequency range, realize impedance matching preferably, complete energy conversion expeditiously, and obtain desirable radiation pattern, gain is high, additionally, described antenna to take volume little, thus the overall volume of CMMB reception terminal is little, environmental requirement is low.
Accompanying drawing explanation
Fig. 1 is the CMMB of the present invention theory diagram receiving terminal；
Fig. 2 is the CMMB of the present invention front view receiving terminal antenna；
Fig. 3 is the CMMB of the present invention rearview receiving terminal antenna；
Fig. 4 a is the schematic diagram of complementary opening resonance loop structure；
Fig. 4 b show the schematic diagram of complementary helix structure；
Fig. 4 c show the schematic diagram of opening helical ring structure；
Fig. 4 d show the schematic diagram of dual openings helical ring structure；
Fig. 4 e show the schematic diagram of complementary folding line structure；
Fig. 5 a is the derivative schematic diagram of its geometry of complementary opening resonance loop structure shown in Fig. 5 a；
Fig. 5 b is the derivative schematic diagram of its extension of the complementary opening resonance loop structure shown in Fig. 5 a；
Fig. 6 a is the structural representation after the compound of the complementary opening resonance loop structure shown in three Fig. 4 a；
Fig. 6 b is the compound schematic diagram that the complementary opening resonance loop structure shown in two Fig. 4 a and Fig. 4 b show complementary helix structure；
Fig. 7 is the structural representation after the complementary opening resonance loop structure group battle array shown in four Fig. 4 a.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, CMMB of the present invention is received terminal to be further described:
Super-material antenna forms based on artificial electromagnetic material Technology design, artificial electromagnetic material refers to the topological metal structure that sheet metal is engraved into given shape, and the extraordinary electromagnetic material of equivalence that the topological metal structure of described given shape is arranged on certain dielectric constant and pcrmeability base material processing and manufacturing, its performance parameter depends primarily on the topological metal structure of the given shape of its sub-wavelength.In resonance band, artificial electromagnetic material generally embodies the dispersion characteristics of height, in other words, the impedance of antenna, holds perceptual, equivalent dielectric constant and pcrmeability and violent change can occur along with frequency.Thus can adopt artificial electromagnetic material technology that the fundamental characteristics of above-mentioned antenna is transformed so that the medium substrate that metal structure depends on it equally constitutes a highly dispersed extraordinary electromagnetic material, thus realizing the new antenna that radiation characteristic is abundant.
Refer to Fig. 1 to Fig. 3, CMMB of the present invention and receive the antenna 2 that terminal includes CMMB reception terminal body 1 and is arranged in described CMMB reception terminal body 1 and conduct signal transmission.Described CMMB receives terminal body 1 and includes front end signal pretreatment module 11, baseband signal processing module 12, display module 13 and audio signal output module 14, described front end signal pretreatment module includes the tuner unit 111 of order electrical connection, demodulating unit 112 and UAM condition reception unit 113, described tuner unit 111 electrically connects with described antenna 2, described UAM condition reception unit 113 electrically connects with described baseband signal processing module 12, described tuner unit 111, demodulating unit 112 and UAM condition reception unit 113 are respectively used to receive the signal sent from antenna 2, channel solution mediation program decryption；Described baseband signal processing module 12 has been used for the communication protocol stack process of TD/GSM, system administration and multi-media processing；Described display module 13 is for showing, by the information after baseband signal processing module 12 processes, discernible information of being grown up；Described audio signal output module 14 is for converting the information after baseband signal processing module 12 processes to audio signal.
In the present embodiment, described front end signal pretreatment module 11 and baseband signal processing module 12 are IF228 chip and SH7343 chip respectively, IF228 chip has integrated level height, super-small, demodulation performance is strong, anti-mono-tone interference ability is strong, super low-power consumption, supports the input of multiple clock frequency and supports the advantages such as hard descrambling.Described SH7343 chip can not only realize the decoding of TS code stream hardware, and signal processing and the function control of baseband circuit can be born, SH7343 is internally integrated an efficient power management module simultaneously, cpu power power consumption can be optimized, it is possible to provide good system scheme for the exploitation of hand-held mobile terminal and perfect in shape and function when higher position manages speed.
Described antenna 2 is Super-material antenna, and it includes medium substrate 21, metal structure 22, feeder line 23 and reference ground, and described medium substrate 21 is in rectangular tabular, and it can be made up of materials such as high molecular polymer, pottery, ferroelectric material, ferrite material or ferromagnetic materials.In the present embodiment, the material of described medium substrate 21 adopts glass material (FR4) to make, thus not only cost is low, and can ensure to keep good antenna operating characteristics in different operating frequencies.
Described metal structure 22, feeder line 23 and with reference to be placed on the surface of described medium substrate 21, described metal structure 22 forms Meta Materials with described medium substrate 21, the performance of described Meta Materials depends on described metal structure 22, in resonance band, Meta Materials generally embodies the dispersion characteristics of height, its impedance i.e., hold perception, violent change can be there is along with frequency in the dielectric constant of equivalence and pcrmeability, thereby through the fundamental characteristics changing described metal structure 22 and medium substrate 21, just described metal structure 22 and medium substrate 21 is made equally to form a highly dispersed extraordinary electromagnetic material according to Lorentz material resonances model.
Refer to Fig. 1 and Fig. 4 to Fig. 7, described metal structure 22 can be complementary opening resonance loop structure, complementary helix structure, opening helical ring structure, dual openings helical ring structure, complementary folding line structure, the derived structure of complementary opening resonance loop structure, complementary opening resonance loop structure compound after any one or similar topological metal structure in structure after structure, complementary opening resonance loop structure group battle array or metal etch pattern, the shape of described metal structure 22 has infinite multiple, it is not limited to above-mentioned lifted structure.In the present embodiment, described metal structure 22 is provided with framework 221 and is positioned at two helixes 222 of described framework 221, described two helixes 222 are interconnected to form opening helical ring, described opening helical ring is connected with described framework 221, the free end of described helix 222 is panel shape, and the end of described panel shape can increase being amassed by corrugated of antenna.
Described feeder line 23 is arranged on the side of described metal structure 22, and extends along the length direction of described metal structure 22, and itself and described metal structure 22 intercouple, and wherein, one end bending of described feeder line 23 extends to side, described metal structure 22 end.Additionally, as needed in the space between described feeder line 23 and metal structure 22 embeds capacitive electrical element, can couple by embedding the signal between capacitive electrical element regulation feeder line 23 and metal structure 22, by formula:, it is known that square being inversely proportional to of the size of capacitance and operating frequency, so when the operating frequency needed is relatively low operating frequency, it is possible to realize by being appropriately embed capacitive electrical element.The capacitance value range of capacitive electrical element added is generally between 0-2pF, but the capacitance embedded along with the change of operating frequency of antenna is likely to the scope beyond 0-2pF.
The described side being positioned at described feeder line 23 with reference to ground, makes one end being positioned at described metal structure 22 end of described feeder line 23 form microstrip line 231.In the present embodiment, described including first with reference to ground unit 24 and second with reference to ground unit 25 with reference to ground, described first lays respectively at relative two surfaces of described medium substrate 21 with reference to ground unit 24 and second with reference to ground unit 25.Described first is provided with, with reference to ground unit 24, the first metal covering unit 241 and the second metal covering unit 242 being electrically connected to each other.Described second is positioned at the same side of described medium substrate 21 with reference to ground unit 25 and described feeder line 23, and is provided with the 3rd metal covering unit 251 and the 4th metal covering unit 252.
Described first metal covering unit 241 is relative with described feeder line 23 position, makes one end being positioned at described metal structure 22 end of described feeder line 23 form described microstrip line 231, and namely described is virtually with reference to ground.Described second metal covering unit 242 is relative with described 3rd metal covering unit 251 position.Described 3rd metal covering unit 251 is positioned at one end of described metal structure 22, and described 3rd metal covering unit 251 is long side tabular, and identical with the bearing of trend of described feeder line 23.Described medium substrate 21 is positioned at described second metal covering unit 242 and described 3rd metal covering unit 251 place offers some plated-through holes 26, and described second metal covering unit 242 is electrically connected by described plated-through hole 26 with described 3rd metal covering unit 251.
Described 4th metal covering unit 252 is positioned at the side of described feeder line 23 one end, and is positioned on the bearing of trend of described feeder line 23.Described medium substrate 21 is positioned at described first metal covering unit 241 and described 4th metal covering unit 252 place offers some plated-through holes 26, and described first metal covering unit 241 is electrically connected by described plated-through hole 26 with described 4th metal covering unit 252.Forming described microstrip line 231 by one end of the first metal covering unit 241 with described feeder line 23, thus can reduce the external signal signal disturbing to transmitting on described feeder line 23, improve antenna gain, it is achieved impedance matching preferably, save material, cost is low.Described first metal covering unit 241 is arranged by position cleverly between the 4th metal covering unit 252, thus takies less space with making described reference, just realizes bigger area.Additionally, by arranging described plated-through hole 26, thus can further improve the described area with reference to ground.
In sum, CMMB of the present invention receives microstrip line 231 described in the terminal topographic morphologies by critically control antenna metal structure 22 and rational deployment, just obtain the effective dielectric constant and the pcrmeability distribution that need, enable the antenna to enough in working frequency range, realize impedance matching preferably, complete energy conversion expeditiously, and obtain desirable radiation pattern, gain is high, additionally, described antenna to take volume little, thus the overall volume of CMMB reception terminal is little, environmental requirement is low.
Above in conjunction with accompanying drawing, presently preferred embodiments of the present invention is described, but the invention is not limited in above-mentioned detailed description of the invention, above-mentioned detailed description of the invention is merely schematic, rather than it is restrictive, those of ordinary skill in the art is under the enlightenment of the present invention, without departing under present inventive concept and scope of the claimed protection situation, it may also be made that a lot of form, such as, it is provided with connector between described metal structure 22 and described feeder line 23, described metal structure 22 is made to be electrically connected to each other with described feeder line 23, namely inductive coupled mode etc. is adopted between described metal structure 22 and described feeder line 23, these belong within protection scope of the present invention.
Claims (9)
1. a CMMB receives terminal, receive terminal body including CMMB and be arranged on the described CMMB antenna receiving in terminal body and conducting signal transmission, it is characterized in that: described antenna is Super-material antenna, this antenna includes medium substrate, metal structure, feeder line and reference ground, described metal structure, feeder line and with reference to be placed on described medium substrate, described feeder line and described metal structure intercouple, described the first reference ground unit and second including being positioned on relative two surfaces of described medium substrate with reference to ground is with reference to ground unit, described first makes one end of described feeder line form microstrip line with reference to ground unit；
Described CMMB receives terminal body and includes front end signal pretreatment module, baseband signal processing module and display module, described front end signal pretreatment module includes the tuner unit of order electrical connection, demodulating unit and UAM condition reception unit, described tuner unit is connected with described antenna electric, described UAM condition reception unit electrically connects with described baseband signal processing module, described tuner unit is for receiving the signal sent from antenna, described demodulating unit is for channel demodulation, and described UAM condition reception unit is used for program decryption；Described baseband signal processing module has been used for communication protocol stack process, system administration and multi-media processing；Described display module is for showing, by the information after baseband signal processing module processes, discernible information of being grown up.
2. CMMB according to claim 1 receives terminal, it is characterised in that: described medium substrate is provided with some plated-through holes, and described first realizes electrically connecting by described plated-through hole with reference to ground unit with described second with reference to ground unit.
3. CMMB according to claim 1 receives terminal, it is characterized in that: described first is provided with, with reference to ground unit, the first metal covering unit and the second metal covering unit that are electrically connected to each other, described first metal covering unit is relative with an end position of described feeder line, makes one end of described feeder line form described microstrip line；Described second is provided with the 3rd metal covering unit with reference to ground unit, and described 3rd metal covering unit is relative with described second metal covering cell position.
4. CMMB according to claim 3 receives terminal, it is characterized in that: described medium substrate is positioned at described second metal covering unit and described 3rd metal covering unit place offers some plated-through holes, and described second metal covering unit is electrically connected by described plated-through hole with described 3rd metal covering unit.
5. CMMB according to claim 4 receives terminal, it is characterised in that: described 3rd metal covering unit is positioned at one end of described metal structure, and described 3rd metal covering unit is long side tabular, and identical with the bearing of trend of described feeder line.
6. CMMB according to claim 3 receives terminal, it is characterised in that: described second also includes the 4th metal covering unit with reference to ground unit, and described 4th metal covering unit with described feeder line one end separately, and is positioned on the bearing of trend of described feeder line.
7. CMMB according to claim 6 receives terminal, it is characterized in that: described medium substrate is positioned at described first metal covering unit and described 4th metal covering unit place offers some plated-through holes, and described first metal covering unit is electrically connected by described plated-through hole with described 4th metal covering unit.
8. CMMB according to claim 1 receives terminal, it is characterised in that: described metal structure be complementary opening resonance loop structure, complementary helix structure, opening helical ring structure, dual openings helical ring structure, complementary folding line structure, complementary opening resonance loop structure compound after any one in structure.
9. CMMB according to claim 1 receives terminal, it is characterized in that: described metal structure is provided with framework and is positioned at two helixes of described framework, described two helixes are interconnected to form opening helical ring, described opening helical ring is connected with described framework, and the free end of described helix is panel shape.
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| CN201110331048.7A CN103095314B (en) | 2011-10-27 | 2011-10-27 | CMMB receives terminal |
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| CN103095314B true CN103095314B (en) | 2016-06-29 |
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Effective date of registration: 20201117 Address after: 226600 no.428, Zhennan Road, Haian City, Nantong City, Jiangsu Province Patentee after: Haian IC Technology Innovation Center Address before: 518057, No. 9 software building, central high tech Zone, Nanshan District hi tech Zone, Guangdong, Shenzhen Patentee before: KUANG-CHI INSTITUTE OF ADVANCED TECHNOLOGY Patentee before: KUANG-CHI INNOVATIVE TECHNOLOGY Ltd. |
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