Analysis and equivalent circuit of aperture‐coupled cavity‐fed microstrip patch antenna

Kim, Jeong Phill

doi:10.1002/mop.21493

Cited by 5 publications

(4 citation statements)

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“…Earlier research has calculated some of the circuit‐element values, including n m , n v , ( Z 0v1 , β v1 ), ( Z 0v2 , β v2 ), Y b , n 10 , and B hm , Z 010 and β 10 , and Z r0 . To model the more complex structures such as the open‐ended waveguide with the VM substrate and the right‐angle VM line bend, numerical simulations can be used.…”

Section: Modelingmentioning

confidence: 99%

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Broadband cavity‐backed aperture‐coupled vertically mounted strip antenna

Fan

Bian

Kim

2020

Micro & Optical Tech Letters

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A novel cavity‐backed aperture‐coupled antenna having a vertically mounted (VM) strip is proposed, where the signal is fed to the antenna from a microstrip feed through an aperture‐coupled microstrip‐to‐waveguide transition. Broadband characteristics are achieved by the introduction of the VM strip. An equivalent‐circuit model for this antenna that reflects the effects of various structure parameters is proposed. Based on this equivalent circuit, an X‐band antenna was designed by optimizing for broadband, low loss, and highly efficient operation. The measured S11 of the fabricated antenna showed excellent broadband characteristics (47%) and was in reasonable agreement with predictions derived from the equivalent circuit and numerical simulation.

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Section: Modelingmentioning

confidence: 99%

“…Earlier research has calculated some of the circuitelement values, including n m , [8][9][10] n v , (Z 0v1 , β v1 ), (Z 0v2 , β v2 ), 5-7 Y b , n 10 , and B hm , 11,12 Z 010 and β 10 , 13 and Z r0 . 14 To find the optimal values for L a , L v , W v , and S v , parametric studies were performed with the aperture width fixed at W a = 0.50 mm.…”

Section: Modelingmentioning

confidence: 99%

Broadband cavity‐backed aperture‐coupled vertically mounted strip antenna

Fan

Bian

Kim

2020

Micro & Optical Tech Letters

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“…The equivalent network models developed for an aperture-coupled microstrip cir- cuits and antenna [6 -8] have to be combined and slightly modified for reflecting the effect of aperture-coupled cavity in a thick ground plane accurately [9]. It is well-known that electromagnetic coupling between the microstripline and aperture in the ground plane can be modeled by an ideal transformer with turns ratio n with the help of the reciprocity theorem [10].…”

Section: Structure and Equivalent Circuitmentioning

confidence: 99%

“…The effect of the complex power flow from aperture into a half space with substrate is represented by the equivalent admittance Y s [11]. The rectangular cavity with two apertures in a thick ground plane can be regarded as two aperture-to-waveguide sections in a back-toback configuration, and coupling between the aperture and rectangular waveguide can be modeled by parallel connected transmission lines with transformers corresponding to all the propagating and evanescent modes [9]. Now the opposite part can be modeled similarly, the equivalent circuit of a single section coupling structure is obtained.…”

Section: Structure and Equivalent Circuitmentioning

confidence: 99%

Aperture‐coupled cavity‐fed back‐to‐back microstrip directional coupler

Nam

Kim

et al. 2008

Micro & Optical Tech Letters

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An analysis and design theory of an aperture-coupled cavity-fed back-to-back microstrip directional coupler is presented for efficient and optimized design. For this purpose, an equivalent network is developed, and a simple yet accurate circuit element value calculation is described. Design equations of the coupler are derived based on the equivalent circuit. To determine various structural design parameters, the evolutionary hybrid optimization method based on a genetic algorithm and the Nelder-Mead method is used. As a validation check of the proposed theory and optimized design method, a 10 dB directional coupler was designed and fabricated. The measured coupling was 10.3 dB at 3 GHz, and the return loss and isolation were 31.8 dB and 30.5 dB, respectively. The directional coupler also showed very good quadrature phase characteristics. Good agreements between the measured and the design specifications fully validate the proposed network analysis and design procedure.ABSTRACT: A novel uniplanar electromagnetic Band-Gap (EBG) scheme is presented for size reduction, the proposed structure can be considered as an ameliorated uniplanar compact EBG (UC-EBG) incorporated with interdigital structure which enlarges the fringe capacitance to compress the overall size of unit cell. Its design is detailed in this article and several simulation and experimental results are presented, the properties of the proposed ID-UC-EBG are examined when compared with that of the conventional UC-EBG.

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