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- Title
A Comprehensive Review on Microstrip Couplers: Structure, Design Method, and Performance.
- Authors
Rezaei, Abbas; Yahya, Salah I.; Nouri, Leila
- Abstract
In this paper, several types of microstrip couplers are investigated in terms of structure, performance, and design methods. These planar 4-ports passive devices transmit a signal through two different channels. Designers' competition has always been in miniaturizing and improving performance of couplers. Proposing a novel structure is an advantage of some previously reported couplers. A high-performance coupler should have high isolation and low losses at both channels. The common port return loss in the pass band should have a low value. Among the couplers, those with balanced amplitude and phase are more popular. The popular mathematical analysis methods are even/odd mode analysis, extracting the information from the ABCD matrix and analyzing the equivalent LC circuit of a simple resonator. According to the phase shift value, couplers are classified as 90° and correct multiples of 90°, where a microstrip 0° coupler can be used as a power divider. Some couplers have filtering and harmonic elimination features that are superior to other couplers. However, few designers paid attention to suppressing the harmonics. If the operating frequency is set in according to the type of application, the coupler becomes particularly valuable.
- Subjects
MICROSTRIP couplers; MATHEMATICAL analysis; RESONATORS; PHASE shifters; BANDPASS filters; FREQUENCY response
- Publication
ARO: The Scientific Journal of Koya University, 2023, Vol 11, Issue 1, p22
- ISSN
2410-9355
- Publication type
Article
- DOI
10.14500/aro.11108