Broadband aperture-coupled microstrip line to waveguide transition with loading a vertically mounted strip

Abstract

A novel aperture‐coupled microstrip‐to‐waveguide transition is presented in this article. A vertically mounted strip has been inserted into the E‐plane of a rectangular waveguide in order to provide broadband characteristics and higher forward transmission efficiency. A parametric study was made in order to obtain the optimal design data for broadband, low loss, and high efficiency. In addition, a tolerance study proves that the proposed transition is robust in regards to mechanical assembly and alignment. An X‐band transition was designed, and the measured results demonstrate that the transition shows a broadband (49.5 % with a reference return loss of 10 dB), low insertion loss (0.41 dB), and high transmission efficiency (93.40 %). © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:811–815, 2017

Broadband aperture‐coupled conducting sphere antenna

“…The reciprocal two‐port network can be represented by an equivalent π‐network, and aperture‐coupled circuits and antennas are known to be well modeled 10–13 by only the series‐connected element, as shown in Figure 2A.…”

“…The reciprocal two-port network can be represented by an equivalent π-network, and aperture-coupled circuits and antennas are known to be well modeled [10][11][12][13] by only the series-connected element, as shown in Figure 2A. The turns ratio n of the ideal transformer and the admittance Y a of the aperture itself with only two substrates (no conducting sphere or feed line) were calculated by the method detailed in reference.…”

Broadband cavity‐backed aperture‐coupled vertically mounted strip antenna

“…This paper proposes a new broadband antenna in the form of a cavity‐backed aperture‐coupled vertically mounted (VM) strip by extending the idea of the broadband aperture‐coupled waveguide transition . The VM strip antenna has been studied previously as an alternative solution to the full planar antenna element and array configurations for increasing bandwidth and design of freedom …”

“…1-3 For these applications, high-resolution is essential, and therefore a broadband antenna is highly recommended.This paper proposes a new broadband antenna in the form of a cavity-backed aperture-coupled vertically mounted (VM) strip by extending the idea of the broadband aperturecoupled waveguide transition. 4 The VM strip antenna has been studied previously as an alternative solution to the full planar antenna element and array configurations for increasing bandwidth and design of freedom. [5][6][7] An equivalent circuit of the proposed aperture-coupled waveguide transition was developed to explain the operating mechanism and to provide initial design parameters of the antenna.…”