Design and optimization of a cavity-backed spiral antenna for use in 6–12 GHz band

Abstract

The design and optimization of a self-complementary two-arm Archimedean spiral antenna backed by an absorptive cavity were presented. Parametric studies on the proposed antenna structure were carried out by using CST MWS. Simulation results show that the proper choice of spiral turns and cavity depth can miniaturize the dimensions of the cavity-backed spiral antenna presented here. According to simulation results, prototype antennas operating in the 6–12 GHz band are fabricated and the dimension of the proposed cavity-backed spiral antenna is 22 mm (diameter)×15 mm (height). The performance of the proposed antenna was measured and compared with the simulation results. It is shown that the experimental results are consistent with the theoretical predictions and the suggested antenna is good enough to adapt for various wideband applications.

Keywords

cavity-backed spiral antenna / miniaturization / balanced structure / wideband balun

References

[1] JingN-k, ZhaoH-l, HuangL-hao. A novel design of planar spiral antenna with metamaterial [C]. Progress in Electromagnetics Research Symposium Proceedings. Xi’an, China, 2010725-728

[2] FernandoC S R, UduwawalaD. A parametric study of equiangular spiral antenna (Arm type) [C]. Fourth International Conference on Industrial and Information Systems. Sri Lanka, 200989-93

[3] LiuQ, RuanC L, PengL, WuW X. A novel compact Archimedean spiral antenna with gap-loading [J]. Progress in Electromagnetics Research Letters, 2008, 3: 169-177

[4] PaulS, ChenW U T, MustaphaC E. Yagoub novel ultra wideband printed balun design using the FEM and FDTD methods [C]. IEEE Antennas and Propagation Society International Symposium. Washington, DC, USA, 2005643-646

[5] Caswell, EricD. Design and analysis of star spiral with application to wideband arrays with variable element sizes [D]. Virginia Tech, 2001

[6] DuY-x, XiX-l, GuoWei. The design and simulation of two-armed spiral antenna for microwave hyperthermia [C]. 5th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). Wuhan, China, 20111-43

[7] LiuC-h, LuY-g, DuC-l, CuiJ-b, ShenX-ming. The broadband spiral antenna design based on hybrid backed-cavity [J]. IEEE Transactions on Antennas and Propagation, 2010, 58(6): 1876-1882

[8] NakanoH, IgarashiT, OyanagiH, IitsukaY, YamauchiJ. Unbalanced-mode spiral antenna backed by an extremely shallow cavity [J]. IEEE Transactions on Antennas and Propagation, 2009, 57(6): 1625-1633

[9] FeiD, ZhangF-s, ZhangYue. The broadband composite structure spiral antenna with a ladder-shaped backed-cavity [C]. The 4th International Symposium on Microwave, Antenna, Propagation, and EMC Technologies for Wireless Communications (MAPE), 2011Beijing, ChinaIEEE120-123

[10] PiksaP, MazánekM. A self-complementary 1.2 to 40 GHz spiral antenna with impedance matching [J]. Radio Engineering, 2006, 15(3): 15-19

[11] RaoP H, SreenivasanM, NaraganiL. Dual band planar spiral feed backed by a stepped ground plane cavity for satellite boresight reference antenna applications [J]. IEEE Transactions on Antennas and Propagation, 2009, 57(12): 3752-3756

[12] RahmanN, SharmaA, AfsarM. Characterization, design and optimization of low-profile cavities for UWB spiral antennas [J]. International Journal of Electromagnetics and Applications, 2012, 2(3): 16-23

[13] WangY-w, WangG-m, YuZ-wu. Design of a highly miniaturized compound spiral antenna [C]. Proceedings of International Symposium on Signals, Systems and Electronics (ISSSE2010). Nanjing, China, 20101-3

[14] BellJ M, IskanderM F. A low-profile Archimedean spiral antenna using an ebg ground plane [J]. IEEE Antennas and Wireless Propagation Letters, 2004, 3: 223-226

[15] VinayagamoorthyK, CoetzeeJ, JayalathD. Microstrip to parallel strip balun as spiral antenna feed [C]. IEEE Vehicular Technology Conference (VTC Spring). Yokohama, Japan, 20121-5

[16] LestariA A, BharataE, SuksmonoA B, YarovoyA G, LigthartL P. Bent tapered microstrip balun transformer [C]. Asia Pacific Microwave Conference. Singapore, 20092156-2159

[17] TrippV K, HopkinsG D. A new tapered double balun for spiral-mode 2 [C]. IEEE Antennas and Propagation Society International Symposium, 20071981-1984

[18] RizviS A P, KhanR A A. Klopfenstein tapered 2–18 GHz microstrip balun [C]. Proceedings of 9th International Bhurban Conference on Applied Sciences & Technology (IBCAST), 2009359-362