CN111313148A - Flexible active monopole antenna - Google Patents
Flexible active monopole antenna Download PDFInfo
- Publication number
- CN111313148A CN111313148A CN202010129715.2A CN202010129715A CN111313148A CN 111313148 A CN111313148 A CN 111313148A CN 202010129715 A CN202010129715 A CN 202010129715A CN 111313148 A CN111313148 A CN 111313148A
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- Prior art keywords
- circuit
- monopole antenna
- low
- noise amplifier
- antenna
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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
- H01Q1/36—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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Details Of Aerials (AREA)
Abstract
The invention discloses a flexible active monopole antenna, which comprises a flexible medium substrate, a low-noise amplifier circuit and an antenna, wherein the low-noise amplifier circuit and the antenna are attached to the flexible medium substrate and are connected with each other, the antenna comprises a transmission feeder line and a monopole antenna, one end of the low-noise amplifier circuit is connected with a radio frequency connector, the other end of the low-noise amplifier circuit is connected with one end of the transmission feeder line, the other end of the transmission feeder line is connected with the monopole antenna, and the noise amplification circuit comprises a low-noise amplifier chip, an input impedance matching circuit, an output impedance matching circuit, an interstage feedback circuit and a direct current bias circuit. The flexible active monopole antenna adopts the flexible medium substrate, improves the flexibility of the antenna on the premise of keeping the performance of the active monopole antenna, solves the problem of conformal between the antenna and equipment, and enlarges the application range of the monopole antenna; and the gain of the monopole antenna is improved by using the low-noise amplification circuit.
Description
Technical Field
The present invention relates to a monopole antenna, and more particularly, to a flexible active monopole antenna.
Background
In order to meet the requirements of small size and portability of wireless communication products, antenna designs are gradually developed toward planarization, miniaturization and broadband. In recent years, a planar monopole antenna with omnidirectional radiation characteristics, a simple structure and low cost is widely applied, the planar monopole antenna has a large bandwidth, and a radiation pattern is not easily affected by other factors, so that the planar monopole antenna is an omnidirectional antenna with stable performance. However, due to the omnidirectional radiation characteristic of the planar monopole antenna, the gain of the planar monopole antenna is low, the traditional rigid medium substrate has poor adaptability to the installation environment, the bending degree of the antenna is small, the antenna and equipment are difficult to conform, and the application range of the antenna is limited.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a flexible active monopole antenna which is high in gain, good in installation adaptability and good in conformal effect.
The technical scheme is as follows: the invention discloses a flexible active monopole antenna, which comprises a flexible medium substrate, a low-noise amplifier circuit, a transmission feeder line and a monopole antenna, wherein one end of the low-noise amplifier circuit is connected with a radio frequency connector, the other end of the low-noise amplifier circuit is connected with one end of the transmission feeder line, the other end of the transmission feeder line is connected with the monopole antenna, and the low-noise amplifier circuit and the antenna are attached to the flexible medium substrate.
The monopole antenna is an antenna radiation unit and is a metal patch with the length of 25-30 mm and the width of 25-30.0 mm; the noise amplifying circuit comprises a low-noise amplifier chip, an input impedance matching circuit, an output impedance matching circuit, an interstage feedback circuit and a direct current bias circuit, wherein the input/output end of the low-noise amplifier chip is connected with the input impedance matching circuit and the output impedance matching circuit; the direct current bias circuit is composed of a series inductor L2-L4, a resistor R1-R4 and a parallel capacitor C3-C6, C8-C9 and C7-C10 which are of a symmetrical structure; the output impedance matching circuit is formed by connecting a capacitor C5 and a resistor R3 in series, an external circuit and the output end of the low-noise amplifier chip achieve impedance matching, and signals are transmitted without reflection; the input impedance matching circuit is formed by a T-shaped matching network of a series inductor L1, a capacitor C1 and a parallel capacitor C2, an external circuit and the input end of the low-noise amplifier chip (1) achieve impedance matching, and signals are transmitted without reflection; the flexible medium substrate is polyimide.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: 1. by adopting the flexible medium substrate, on the premise of keeping the performance of the active monopole antenna, the flexibility of the antenna is improved, the problem of conformal between the antenna and equipment is solved, and the application range of the monopole antenna is expanded; 2. and the gain of the monopole antenna is improved by using the low-noise amplification circuit.
Drawings
FIG. 1 is a front side of a wiring pattern of the present invention;
FIG. 2 is the reverse of the artwork of the present invention;
FIG. 3 is a circuit schematic of the present invention;
fig. 4 is a return loss plot of the present invention.
Detailed Description
As shown in fig. 1 to 3, the flexible active monopole antenna includes a flexible dielectric substrate, a low noise amplifier circuit and an antenna, the low noise amplifier circuit and the antenna are attached to the flexible dielectric substrate, the flexible dielectric substrate is made of polyimide, the antenna is connected to the low noise amplifier circuit, the antenna includes a transmission feeder 6 and a monopole antenna 7, one end of the low noise amplifier circuit is connected to the radio frequency connector, the other end of the low noise amplifier circuit is connected to one end of the transmission feeder 6, the other end of the transmission feeder 6 is connected to the monopole antenna 7, the transmission feeder 6 is a microstrip line with a line width of 0.6mm, the impedance is 50 Ω, the monopole antenna 7 is an antenna radiation unit, and is a metal patch with a length of 30mm and a width of 30.0 mm; the noise amplifying circuit comprises a low noise amplifier chip 1, an input impedance matching circuit 2, an output impedance matching circuit 3, an inter-stage feedback circuit 4 and a direct current bias circuit 5, wherein an input/output end of the low noise amplifier chip 1 is connected with the input impedance matching circuit 2 and the output impedance matching circuit 3, the inter-stage feedback circuit 4 is positioned at the input/output end of the low noise amplifier chip 1 in series, the direct current bias circuit 5 is connected on the low noise amplifier chip 1 in parallel, the low noise amplifier chip 1 adopts MGF4921AM, the working frequency is at 2GHz, the gain is 18dB, the stabilizing circuit 4 adopts a resistor R2-680 omega, a capacitor C4-62 pF is connected in series at the input end and the output end of the inter-stage chip to prevent the self-excitation of the amplifier, the direct current bias circuit 5 adopts a symmetrical structure, a series inductor L2-L4-33 nH, a resistor R1-R4-10 and a parallel capacitor C3-C6-pF 62, C8 ═ C9 ═ 1uF, C7 ═ C10 ═ 10uF, the gate supply voltage is-0.5V, the drain supply voltage is 2V, guarantee the chip 1 of low noise and work on its operating point, output impedance matching circuit 3, use C5 ═ 62pF, R3 ═ 8.2 Ω and connect in series and form, make the output terminal of the chip 1 of low noise and put the external circuit and reach impedance matching, enable the non-reflection transmission of the signal, input impedance matching circuit 2, use series inductance L1 ═ 3.9nH, the capacitance C1 ═ 62pF and parallel capacitance C2 ═ 1pF and form the matching network of T shape, make the input end of the chip 1 of external circuit and low noise reach impedance matching, make the non-reflection transmission of the signal enable.
Fig. 4 is a return loss plot of the present invention, and it can be seen that the port return loss S11 reaches-28 dB at 2GHz, indicating that the port matching degree of the present invention is good.
Claims (7)
1. The flexible active monopole antenna is characterized by comprising a flexible dielectric substrate, a low-noise amplifier circuit, a transmission feeder (6) and a monopole antenna (7), wherein one end of the low-noise amplifier circuit is connected with a radio frequency connector, the other end of the low-noise amplifier circuit is connected with one end of the transmission feeder (6), the other end of the transmission feeder (6) is connected with the monopole antenna (7), and the low-noise amplifier circuit and the antenna are attached to the flexible dielectric substrate.
2. The flexible active monopole antenna according to claim 1, wherein said monopole antenna (7) is an antenna radiating element, being a metal patch having a length of 25-30 mm and a width of 25-30.0 mm.
3. The flexible active monopole antenna according to claim 1, wherein the noise amplification circuit comprises a low noise amplifier chip (1), an input impedance matching circuit (2), an output impedance matching circuit (3), an interstage feedback circuit (4) and a direct current bias circuit (5), wherein an input/output end of the low noise amplifier chip (1) is connected with the input impedance matching circuit (2) and the output impedance matching circuit (3), the interstage feedback circuit (4) is arranged at an input/output end of the low noise amplifier chip (1) in series, and the direct current bias circuit (5) is connected on the low noise amplifier chip (1) in parallel.
4. The flexible active monopole antenna is characterized in that the direct current bias circuit (5) is formed by a series inductance L2-L4, a resistance R1-R4 and a parallel capacitance C3-C6, C8-C9 and C7-C10 which are symmetrically structured.
5. The flexible active monopole antenna is characterized in that the output impedance matching circuit (3) is formed by serially connecting a capacitor C5 and a resistor R3, an external circuit is matched with the output end of the low-noise amplifier chip (1) in impedance, and signals are transmitted without reflection.
6. The flexible active monopole antenna is characterized in that the input impedance matching circuit (2) is formed by a T-shaped matching network which is connected with an inductor L1, a capacitor C1 and a capacitor C2 in parallel, an external circuit is matched with the input end of the low-noise amplifier chip (1) in impedance, and signals are transmitted without reflection.
7. The flexible active monopole antenna of claim 1, wherein said flexible dielectric substrate is polyimide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010129715.2A CN111313148B (en) | 2020-02-28 | 2020-02-28 | Flexible active monopole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010129715.2A CN111313148B (en) | 2020-02-28 | 2020-02-28 | Flexible active monopole antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111313148A true CN111313148A (en) | 2020-06-19 |
| CN111313148B CN111313148B (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010129715.2A Active CN111313148B (en) | 2020-02-28 | 2020-02-28 | Flexible active monopole antenna |
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| CN (1) | CN111313148B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113571913A (en) * | 2021-08-04 | 2021-10-29 | 重庆大学 | Active small electric transmitting antenna capable of breaking through Bode-Fano limit |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361435A (en) * | 2011-10-28 | 2012-02-22 | 电子科技大学 | Variable gain broadband low-noise amplifier |
| CN106299612A (en) * | 2016-08-05 | 2017-01-04 | 天津大学 | A kind of monopole antenna based on flexible wearable application |
| CN106848564A (en) * | 2017-03-28 | 2017-06-13 | 南京邮电大学 | A kind of aerial array of flexible double-sided symmetrical monopolar 1 × 2 |
| CN206497985U (en) * | 2017-01-24 | 2017-09-15 | 广州海格通信集团股份有限公司 | It is a kind of to realize the application circuit that LoranC system shares whip antenna with short wave communication |
| CN107425270A (en) * | 2017-06-29 | 2017-12-01 | 天津大学 | A kind of special miniaturization printing ultra-wideband monopole antenna of flexible wearable |
| CN108091992A (en) * | 2017-12-06 | 2018-05-29 | 南京邮电大学 | Miniaturized Microstrip Antennas |
| CN108365328A (en) * | 2017-12-26 | 2018-08-03 | 合肥工业大学 | A kind of microwave flexible filtering antenna based on graphene |
| CN110444894A (en) * | 2019-07-26 | 2019-11-12 | 西安电子科技大学 | Circular polarisation wearable antenna based on graphene flexible conductive film |
| CN110571515A (en) * | 2019-09-27 | 2019-12-13 | 成都北斗天线工程技术有限公司 | Miniaturized oblique wave beam ultra-wideband conformal dielectric resonator antenna |
-
2020
- 2020-02-28 CN CN202010129715.2A patent/CN111313148B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361435A (en) * | 2011-10-28 | 2012-02-22 | 电子科技大学 | Variable gain broadband low-noise amplifier |
| CN106299612A (en) * | 2016-08-05 | 2017-01-04 | 天津大学 | A kind of monopole antenna based on flexible wearable application |
| CN206497985U (en) * | 2017-01-24 | 2017-09-15 | 广州海格通信集团股份有限公司 | It is a kind of to realize the application circuit that LoranC system shares whip antenna with short wave communication |
| CN106848564A (en) * | 2017-03-28 | 2017-06-13 | 南京邮电大学 | A kind of aerial array of flexible double-sided symmetrical monopolar 1 × 2 |
| CN107425270A (en) * | 2017-06-29 | 2017-12-01 | 天津大学 | A kind of special miniaturization printing ultra-wideband monopole antenna of flexible wearable |
| CN108091992A (en) * | 2017-12-06 | 2018-05-29 | 南京邮电大学 | Miniaturized Microstrip Antennas |
| CN108365328A (en) * | 2017-12-26 | 2018-08-03 | 合肥工业大学 | A kind of microwave flexible filtering antenna based on graphene |
| CN110444894A (en) * | 2019-07-26 | 2019-11-12 | 西安电子科技大学 | Circular polarisation wearable antenna based on graphene flexible conductive film |
| CN110571515A (en) * | 2019-09-27 | 2019-12-13 | 成都北斗天线工程技术有限公司 | Miniaturized oblique wave beam ultra-wideband conformal dielectric resonator antenna |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113571913A (en) * | 2021-08-04 | 2021-10-29 | 重庆大学 | Active small electric transmitting antenna capable of breaking through Bode-Fano limit |
| CN113571913B (en) * | 2021-08-04 | 2024-04-26 | 重庆大学 | Active electric small transmitting antenna breaking through Bode-Fano limit |
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| Publication number | Publication date |
|---|---|
| CN111313148B (en) | 2022-07-12 |
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Address after: 210003 Gulou District, Jiangsu, Nanjing new model road, No. 66 Applicant after: NANJING University OF POSTS AND TELECOMMUNICATIONS Address before: Yuen Road Qixia District of Nanjing City, Jiangsu Province, No. 9 210046 Applicant before: NANJING University OF POSTS AND TELECOMMUNICATIONS |
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