WO2018120592A1 - Réseau d'alimentation à large bande à double fréquence - Google Patents

Réseau d'alimentation à large bande à double fréquence Download PDF

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Publication number
WO2018120592A1
WO2018120592A1 PCT/CN2017/084462 CN2017084462W WO2018120592A1 WO 2018120592 A1 WO2018120592 A1 WO 2018120592A1 CN 2017084462 W CN2017084462 W CN 2017084462W WO 2018120592 A1 WO2018120592 A1 WO 2018120592A1
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WO
WIPO (PCT)
Prior art keywords
dual
port
frequency coupler
feed network
coupler
Prior art date
Application number
PCT/CN2017/084462
Other languages
English (en)
Chinese (zh)
Inventor
曲美君
邓力
李书芳
张贯京
葛新科
高伟明
张红治
Original Assignee
深圳市景程信息科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市景程信息科技有限公司 filed Critical 深圳市景程信息科技有限公司
Publication of WO2018120592A1 publication Critical patent/WO2018120592A1/fr

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Classifications

    • 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

Definitions

  • the present invention relates to the field of satellite communication technologies, and in particular, to a dual-band broadband feed network.
  • the main object of the present invention is to provide a dual-band broadband feed network, which aims to solve the problem that the existing feed network is bulky, which is not conducive to the integration of the satellite antenna RF front end, and most of them work at a single frequency point, which is disadvantageous in Technical problems in working under multi-frequency or broadband conditions.
  • the present invention provides a dual-band broadband feed network including a coaxial connector, a first port, a second port, a third port, a fourth port, a first dual frequency coupler, and a second dual frequency coupler, wherein:
  • a signal line of the coaxial connector is connected to an input end of the first dual frequency coupler, and a ground line of the coaxial connector is connected to an input end of the second dual frequency coupler;
  • the through end of the first dual frequency coupler is connected to the input end of the first port, the coupling end of the first dual frequency coupler is connected to the input end of the second port, and the isolated end of the first dual frequency coupler is connected to First resistance [0007]
  • the through end of the second dual frequency coupler is connected to the input end of the fourth port, the coupling end of the second dual frequency coupler is connected to the input end of the third port, and the isolated end of the second dual frequency coupler is connected to Second resistance
  • the first dual frequency coupler and the second dual frequency coupler are each composed of twelve transmission lines, and each of the transmission lines has an electrical length of one quarter wavelength.
  • the impedances of the coaxial connector, the first port, the second port, the third port, and the fourth port are both 50 ⁇ .
  • the resistance values of the first resistor and the second resistor are both 50 ⁇ .
  • the first dual frequency coupler and the second dual frequency coupler respectively comprise four double branch impedance matching devices and one branch line coupler, and the four connection ends of the branch line coupler are correspondingly connected Up to four double-branch impedance matchers.
  • the double-branch section impedance matching device includes a transmission line Z1 and a transmission line ⁇ 2, and the transmission line Z1 is connected in series with the transmission line ⁇ 2.
  • the impedance of the transmission line Z1 is 85 ⁇
  • the impedance of the transmission line ⁇ 2 is 62 ⁇ .
  • the branch line coupler includes two transmission lines ⁇ 3 and two transmission lines ⁇ 4, and the transmission line ⁇
  • the impedance of the transmission line ⁇ 3 is 24 ⁇
  • the impedance of the transmission line ⁇ 4 is 33 ⁇ .
  • the dual-band broadband feed network of the present invention adopts the above technical solution, and achieves the following technical effects: using two coaxial couplers of signal lines and ground lines of a coaxial connector Feed, achieve 90° phase shift between adjacent ports of the four output ports.
  • the miniaturization of the feed network is achieved by rationally arranging the couplers.
  • the impedance matching of the dual-frequency coupler can be adjusted to achieve dual-frequency characteristics. If the two frequencies are close together, broadband characteristics can be achieved.
  • FIG. 1 is a schematic diagram showing the circuit structure of a preferred embodiment of a dual-band broadband feed network according to the present invention
  • FIG. 2 is a schematic diagram of S-parameter simulation results of the dual-band broadband feed network of the present invention
  • FIG. 3 is a schematic diagram showing phase difference simulation results of the dual-band broadband feed network of the present invention.
  • FIG. 1 is a schematic diagram showing the circuit structure of a preferred embodiment of a dual-band broadband feed network according to the present invention.
  • the dual-band broadband feed network is integrated on the PCB, and includes a coaxial connector P0, a first port P1, a second port P2, a third port P3, a fourth port P4, and a first Dual frequency coupler 1 and second dual frequency coupler 2.
  • the coaxial connector P0 is a coaxial connector having an impedance value of 50 ⁇ (ohms) as a coaxial feeding portion of a circularly polarized antenna or an array antenna.
  • the signal line of the coaxial connector P0 is connected to the input terminal of the first dual frequency coupler 1, and the ground of the coaxial connector P0 is connected to the input terminal of the second dual frequency coupler 2.
  • the through end of the first dual frequency coupler 1 is connected to the first port P1, the coupling end of the first dual frequency coupler 1 is connected to the second port P2, and the isolated end of the first dual frequency coupler 1 is connected to the first Resistance Rl.
  • the through end of the second dual frequency coupler 2 is connected to the fourth port P4, the coupling end of the second dual frequency coupler 2 is connected to the third port P3, and the isolated end of the second dual frequency coupler 2 is connected to the second resistor R2.
  • the resistance values of the first resistor R1 and the second resistor R2 are each preferably 50 ⁇ , the coaxial connector ⁇ 0, the coaxial connector ⁇ 0, the first port ⁇ 1, the second port ⁇ 2, the third port ⁇ 3, and the
  • the impedance of the four port ⁇ 4 is preferably 50 ⁇ .
  • the first dual frequency coupler 1 and the second dual frequency coupler 2 each include four double branch impedance matching devices 11 and one branch line coupler 12, and four connection ends of the branch line coupler 12 Correspondingly connected to the four double-branch section impedance matching unit 11, that is, one coupling end of the branch line coupler 12 is connected to a double-branch section impedance matching unit 11.
  • Each of the double-branch impedance matching devices 11 includes a transmission line Z1 and a transmission line ⁇ 2, wherein the transmission line Z1 is connected in series with the transmission line ⁇ 2.
  • the branch line coupler 12 includes two transmission lines ⁇ 3 and two transmission lines ⁇ 4, and the two transmission lines ⁇ 3 and the two transmission lines ⁇ 4 are alternately connected in series to form a ring structure.
  • the impedance of the transmission line Z1 is preferably 85 ⁇
  • the impedance of the transmission line ⁇ 2 is preferably 62 ⁇
  • the impedance of the transmission line ⁇ 3 is preferably 24 ⁇
  • the impedance of the transmission line ⁇ 4 is preferably 33 ⁇ .
  • the transmission line Z1, the transmission line ⁇ 2, and the transmission line ⁇ 3 Other suitable impedance values can also be used for the impedance of the transmission line Z4.
  • the first dual frequency coupler 1 and the second dual frequency coupler 2 are each composed of twelve transmission lines, and each of the transmission lines has an electrical length of 1/4 wavelength, that is, a transmission line.
  • the electrical lengths of Z1, transmission line Z2, transmission line Z3, and transmission line Z4 are both 1/4 wavelength.
  • the four coupling ends of the branch line coupler 12 are connected to four double-branch section impedance matchers 11, and impedance transformation can be achieved at two frequencies.
  • the first dual frequency coupler 1 and the second dual frequency coupler 2 achieve dual frequency characteristics if the two frequencies are closely spaced (eg, less than 200 MHz) ), the first dual frequency coupler 1 and the second dual frequency coupler 2 achieve wideband characteristics.
  • the coaxial feed signal line of the coaxial connector P0 (assuming a phase shift of 0° signal) is connected to the first dual-frequency coupler 1, and the phase shift of the signal of 90° can be realized. That is, the coaxial connector P0 outputs 0° signal phase shift, the second port P2 outputs -90° signal phase shift, and the coaxial connector P0 coaxially feeds the ground line, which is equivalent to -180° Signal phase shifting.
  • the signal phase shift of 90° can also be realized, that is, the signal phase shift of the third port P3 output -180°, port P5 Output -270° signal phase shift. Therefore, the dual-band wideband feed network can sequentially output equal-amplitude signals of 0°, -90°, -1 80°, and -270°.
  • FIG. 2 is a schematic diagram of S-parameter simulation results of the dual-band broadband feed network of the present invention. It can be seen from Figure 2 that the reflection coefficient IS00I of the coaxial connector P0 is below -10dB in the range of 1.75GHz to 2.35GHz, indicating that the relative bandwidth of the dual-band broadband feed network can reach 39%, realizing the dual-band broadband feed. Broadband characteristics of electrical networks.
  • the signal energy obtained with respect to the four output ports of the coaxial connector P0 (such as I S10l, IS20I, IS30I, IS40I in FIG. 2) is around -6 dB, the signal energy can be approximated from the coaxial connector P0.
  • the quarters are equally distributed to the four outputs, i.e., signal energy can be equally distributed from the coaxial connector P0 to the first port P1, the second port P2, the third port P3, and the fourth port P4.
  • FIG. 3 is a schematic diagram showing phase difference simulation results of the dual-band broadband feed network of the present invention.
  • the phase difference between adjacent ports of the dual-band broadband feed network is basically stable near the phase shift of 90°, which indicates that there is excellent phase shift between the four outputs of the dual-band wideband feed network. effect.
  • the signal energy between the four ports (the first port P1, the second port P2, the third port P3, and the fourth port P4) is equal amplitude, the phases are phase-shifted by 90°, so the Dual-band broadband feed networks can be widely used in the feeding of circularly polarized antennas, such as circularly polarized antenna arrays or four-armed helical antennas. Used in RF devices that require a four-point effect in the RF field.
  • the dual-band broadband feed network proposed by the present invention feeds two dual-frequency couplers by using a signal line and a ground line of a coaxial connector P0, at four output ports (ports P1, P2, P3, and P4). A phase shift of 90° is achieved between adjacent ports.
  • the miniaturization of the feed network is realized by rationally arranging the dual-frequency coupler.
  • Another advantage of the dual-band wideband feed network of the present invention is that dual-frequency characteristics are achieved by impedance matching of the dual-frequency coupler. If the two frequencies are relatively close, broadband characteristics can be achieved.
  • the dual-band broadband feed network of the present invention adopts the above technical solution, and achieves the following technical effects: using two coaxial couplers of signal lines and ground lines of a coaxial connector Feed, achieve 90° phase shift between adjacent ports of the four output ports.
  • the miniaturization of the feed network is achieved by rationally arranging the couplers.
  • the impedance matching of the dual-frequency coupler can be adjusted to achieve dual-frequency characteristics. If the two frequencies are close together, broadband characteristics can be achieved.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

L'invention concerne un réseau d'alimentation à large bande à double fréquence, comprenant un connecteur coaxial, un premier port, un deuxième port, un troisième port, un quatrième port, un premier coupleur à double fréquence et un second coupleur à double fréquence. Une ligne de signal du connecteur coaxial est connectée à une extrémité d'entrée du premier coupleur à double fréquence. Un fil de masse du connecteur coaxial est connecté à une extrémité d'entrée du second coupleur à double fréquence. Une extrémité à passage direct du premier coupleur à double fréquence est connectée à une extrémité d'entrée du premier port. Une extrémité de couplage du premier coupleur à double fréquence est connectée à une extrémité d'entrée du deuxième port. Une extrémité d'isolation du premier coupleur à double fréquence est connectée à une première résistance. Une extrémité à passage direct du second coupleur à double fréquence est connectée à une extrémité d'entrée du quatrième port. Une extrémité de couplage du second coupleur à double fréquence est connectée à une extrémité d'entrée du troisième port. Une extrémité d'isolation du second coupleur à double fréquence est connectée à une seconde résistance. La présente invention permet de miniaturiser un réseau d'alimentation, de mettre en œuvre un déphasage de 90° entre des ports adjacents des quatre ports de sortie, et d'obtenir à la fois la caractéristique de double fréquence et la caractéristique de large bande du réseau d'alimentation.
PCT/CN2017/084462 2016-12-29 2017-05-16 Réseau d'alimentation à large bande à double fréquence WO2018120592A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201611247063.2 2016-12-29
CN201611247063.2A CN108258438A (zh) 2016-12-29 2016-12-29 双频宽带馈电网络

Publications (1)

Publication Number Publication Date
WO2018120592A1 true WO2018120592A1 (fr) 2018-07-05

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CN (1) CN108258438A (fr)
WO (1) WO2018120592A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040248613A1 (en) * 1999-09-23 2004-12-09 Nortel Networks Limited Directional receiver coupling arrangement with frequency selectivity and gain control for DSL
CN201435450Y (zh) * 2009-06-30 2010-03-31 华南理工大学 极化可重构射频识别圆极化阅读器天线
CN102280678A (zh) * 2011-05-27 2011-12-14 华南理工大学 具有恒定相对带宽的平衡式射频电调带通滤波器
CN103956576A (zh) * 2014-04-26 2014-07-30 华为技术有限公司 一种反馈网络及阵列天线
CN104966881A (zh) * 2015-06-30 2015-10-07 南通大学 一种双频带平衡式功分器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5793338A (en) * 1995-08-09 1998-08-11 Qualcomm Incorporated Quadrifilar helix antenna and feed network
US5828348A (en) * 1995-09-22 1998-10-27 Qualcomm Incorporated Dual-band octafilar helix antenna

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040248613A1 (en) * 1999-09-23 2004-12-09 Nortel Networks Limited Directional receiver coupling arrangement with frequency selectivity and gain control for DSL
CN201435450Y (zh) * 2009-06-30 2010-03-31 华南理工大学 极化可重构射频识别圆极化阅读器天线
CN102280678A (zh) * 2011-05-27 2011-12-14 华南理工大学 具有恒定相对带宽的平衡式射频电调带通滤波器
CN103956576A (zh) * 2014-04-26 2014-07-30 华为技术有限公司 一种反馈网络及阵列天线
CN104966881A (zh) * 2015-06-30 2015-10-07 南通大学 一种双频带平衡式功分器

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