Affiliation:
1. School of Electric and Computer Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea
Abstract
The maximum reflection at an open end of a standard rectangular waveguide is about −10 dB in its operating frequency range. It is often used without matching. For critical applications, it is desirable to further reduce the reflection coefficient. In this paper, a new technique is presented for the broadband impedance matching of an open-ended rectangular waveguide. The proposed technique employs three thin capacitive matching elements placed at proper intervals via a low-loss dielectric material. The capacitance of, and distance between, the matching elements are optimized for broadband impedance matching using a simulation tool. Based on the proposed technique, two design examples are presented for the matching of a WR75 waveguide radiator. A reflection coefficient of less than −16 dB and −20 dB has been achieved over a ratio bandwidth of 2.13:1 and 1.62:1, respectively.
Funder
Ministry of Education
MSIT (Ministry of Science and ICT), Korea
Subject
Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry
Reference50 articles.
1. Microwave antenna and waveguide techniques before 1900;Ramsay;Proc. IRE,1958
2. Rectangular hollow-pipe radiators;Barrow;Proc. IRE,1938
3. Approximate formulas for the far field and gain of open-ended rectangular waveguide;Yaghjian;IEEE Trans. Antennas Propag.,1984
4. Fully probe-corrected near-field far-field transformations with unknown probe antennas;Paulus;IEEE Trans. Antennas Propag.,2023
5. Sun, B., Wen, Y., and Wang, Z. (2013, January 29–31). Calibration on open-ended rectangular waveguide from 1GHz to 26.5GHz. Proceedings of the 5th IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE), Chengdu, China.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献