A Multi-Polarization Reconfigurable Antenna with Isoflux Pattern

doi:10.12141/j.issn.1000-565X.230295

Abstract

Abstract:

With the innovation of space technology, the demand for low earth orbit communication is increasing year by year. Low earth orbit satellites produced in this context are mainly used in remote sensing detection, weather forecasting and data communication fields. Because the earth surface covered by the antenna beam of low earth orbit satellite is spherical, the beam is usually designed as the equal flux form. Because of the problems of polarization mismatch and multipath effect in satellite communication, choosing multipolarization rather than circular polarization as the working state of low earth orbit satellite antenna can better adapt to the complex working environment and ensure the quality of communication. The combination of equal flux beam antenna and multipolarization reconfigurable technology has great application prospects. Based on the design principle of synthesizing linearly polarized waves from a pair of orthogonal circularly polarized waves, a multi-polarization reconfigurable antenna with isoflux beam was proposed in this paper. The antenna consists of a reconfigurable feeding network and a septum polarizer circular waveguide with choke rings. By changing the working states of SP4T switch and SP2T switches embedded in the feeding network, the feeding network will provide different feeding conditions to the circular waveguide, and the antenna can be reconfigured with two kinds of circular polarizations and two kinds of linear polarizations under the action of the septum in the circular waveguide. In addition, the beamforming was realized by introducing choke rings and T-shaped slots structures into the circular waveguide,which ensures that the antenna radiates isoflux pattern under different polarization states. The measured results show that the overlapping impedance bandwidth of -15 dB is 14.7%, covering 4.80~5.56 GHz, and the top of the radiation pattern has a flat effect in the range of θ from -24° to +24°. In the circular polarization states, the spatial axis ratio covers from -51° to +50°, and the coverage range is larger than the flat range at the top of the pattern. The measured results are in good agreement with the simulation results, and the antenna has the advantages of multi-polarization and flat top of the pattern, which can meet the needs of multi-polarization application scenarios in mobile communication and satellite communication.

CLC Number:

TN821⁺.1

JIN Guiping, PAN Weihao, HUANG Juehong, et al. A Multi-Polarization Reconfigurable Antenna with Isoflux Pattern[J]. Journal of South China University of Technology(Natural Science Edition), 2024, 52(3): 131-140.

Figures/Tables 22

Fig.1

Table1

Fig.2

Fig.3

Table 2

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Fig.12

Fig.13

Fig.14

Fig.15

Fig.16

Fig.17

Fig.18

Fig.19

Fig.20

References 15

1	FALLAHZADEH M， ALIAKBARIAN H， HADDADI A，et al ．Beam shaping of X-band stepped choke ring antenna for LED satellite applications［J］．IEEE Aerospace and Electronic Systems Magazine，2018，33（10）：34-39.
2	靳贵平，李龙，孙毅，等．一种基于共面波导馈电的宽带多极化可重构天线［J］．华南理工大学学报（自然科学版），2020，48（12）：34-42.
	JIN Guiping， LI Long， SUN Yi，et al ．Reconfigurable antenna with wideband multi-polarization based on coplanar waveguide fed［J］．Journal of South China University of Technology （Natural Science Edition），2020，48（12）：34-42.
3	CHEN S L， WEI F， QIN P Y，et al ．A multi-linear polarization reconfigurable unidirectional patch antenna［J］．IEEE Transactions on Antennas and Propagation，2017，65（8）：4299-4304.
4	TRAN H H， NGUYEN-TRONG N， LE T T，et al ．Low-profile wideband high-gain reconfigurable antenna with quad-polarization diversity［J］．IEEE Transactions on Antennas and Propagation，2018，66（7）：3741-3746.
5	WONG H， LIN W， HUITEMA L，et al ．Multi-polarization reconfigurable antenna for wireless biomedical system［J］．IEEE Transactions on Biomedical Circuits and Systems，2017，11（3）：652-660.
6	LIN W， WONG H ．Wideband circular-polarization reconfigurable antenna with l-shaped feeding probes［J］．IEEE Antennas and Wireless Propagation Letters，2017，16：2114-2117.
7	WU F， LUK K M ．A compact and reconfigurable circularly polarized complementary antenna［J］．IEEE Antennas and Wireless Propagation Letters，2017，16：1188-1191.
8	CHENG Y， DONG Y ．A high-efficiency electrically reconfigurable circular polarizer and its array application［J］．IEEE Antennas and Wireless Propagation Letters，2021，20（12）：2314-2318.
9	LI B， XUE Q ．Polarization-reconfigurable omnidirectional antenna combining dipole and loop radiators［J］．IEEE Antennas and Wireless Propagation Letters，2013，12：1102-1105.
10	PANAHI A， BAO X L， YANG K，et al ．A simple polarization reconfigurable printed monopole antenna［J］．IEEE Transactions on Antennas and Propagation，2015，63（11）：5129-5134.
11	NISHAMOL M S， SARIN V P， TONY D，et al ．An electronically reconfigurable microstrip antenna with switchable slots for polarization diversity［J］．IEEE Transactions on Antennas and Propagation，2011，59（9）：3424-3427.
12	LI M， ZHANG Z， TANG M C，et al ．Bandwidth enhancement and size reduction of a low-profile polarization-reconfigurable antenna by utilizing multiple resonances［J］．IEEE Transactions on Antennas and Propagation，2022，70（2）：1517-1522.
13	SUNG Y J， JANG T U， KIM Y S ．A reconfigurable microstrip antenna for switchable polarization［J］．IEEE Microwave and Wireless Components Letters，2004，14（11）：534-536.
14	SANO M， HIGAKI M ．A linearly polarized patch antenna with a continuously reconfigurable polarization plane［J］．IEEE Transactions on Antennas and Propagation，2019，67（8）：5678-5683.
15	WANG S， YANG D， GEYI W，et al ．Polarization-reconfigurable antenna using combination of circular polarized modes［J］．IEEE Access，2021：45622-45631.

参数	数值/mm		数值/mm
a	21.2	t₁	4.0
c₁	2.4	r_m	1.6
L₁	12.9	h_m	7.8
L₂	9.9	r₁	33.7
L₃	17.8	r₂	44.0
L₄	15.3	r₃	63.5
g₁	16.4	r₄	76.0
g₂	10	h₁	19.3
g₃	8.2	h₂	16.2
d₁	4.8	h₃	24.0
d₂	4.3	h₄	21.5

工作状态	馈电电路输出条件
LCHP	输出端口1工作，输出端口2不工作
RHCP	输出端口1不工作，输出端口2工作
+45°LP	输出端口1、2同时工作，并且端口1超前端口2，相位90°
-45°LP	输出端口1、2同时工作，并且端口2超前端口1，相位90°