A compact wideband hybrid ring for S-band pulsed and CW applications

Akhtar, Nauman; Kashif, A.; Hayat, Khizar; Bhatti, Nadeem Shahzad; Imran, Muhammad

doi:10.1109/ibcast.2014.6778190

Cited by 2 publications

(4 citation statements)

References 11 publications

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“…The footprint of the proposed circuit is 35% of the conventional two-section rat-race coupler's area. The achieved parameters of the proposed rat-race coupler in comparison with the results published elsewhere [4][5][6] and [8] are summarized in Table 1.…”

Section: Simulation and Experimental Resultsmentioning

confidence: 89%

“…Due to the intrinsic narrowband nature of the common design, its application to wideband systems is thus limited. In the last decade, studies were mainly focused on size reduction [2][3][4][5][6][7] and bandwidth improvement [8][9][10][11] techniques.…”

Section: Introductionmentioning

confidence: 99%

“…Also, various techniques have been proposed to improve the bandwidth of the rat-race coupler. Addition of a fifth port, multiple sections, coplanar waveguide (CPW) phase inverter, short-circuited lines with gap coupling, use of crossovers, and vertically installed planar circuit structure [8][9][10][11] are also strategies employed to improve the bandwidth.…”

Section: Introductionmentioning

confidence: 99%

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A compact and wideband rat-race coupler using two-section ring and artificial transmission lines

Khanmohamadi

Eskandari

2020

Analog Integr Circ Sig Process

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A compact and wideband microstrip rat-race coupler employing two-section ring and artificial transmission lines (ATLs) is reported in this paper. The bandwidth is highly improved by using a two-section rat-race coupler. The physical size of the planar circuit is reduced based on the substitution of the microstrip line with an ATL. The area of the proposed design footprint is 35% of the area of the conventional similar design. The proposed coupler operates over a frequency range of 0.9 GHz to 1.85 GHz. In the desired band, the maximum measured amplitude imbalance is 0.6 dB, the phase variation is ± 7°, and the measured return loss is greater than 15 dB with isolation better than 20 dB. The prototype has been fabricated and measured, and the results are compared with the simulated data to validate the theory.

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Section: Simulation and Experimental Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A compact and wideband rat-race coupler using two-section ring and artificial transmission lines

Khanmohamadi

Eskandari

2020

Analog Integr Circ Sig Process

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“…In order to produce sum and difference signals, both 90° [40] and 180° hybrids [41] have been used which are shown in Fig. 6.…”

Section: Feeding Network Designmentioning

confidence: 99%

Wideband microstrip antenna array with simultaneously low sidelobe level in both sum and difference patterns

Atamanesh

Arand²,

Zahedi³

2018

IET Microwaves, Antennas & Propagation

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An X‐band microstrip antenna array is fully designed. A multilayer structure is chosen for the antenna and the radiating elements are fed by the aperture‐coupled patch technique. A mono‐pulse feeding network is also designed which distributes the power to the radiating elements in a way that low sidelobe level is created in the sum pattern and both difference patterns. The measurement and simulation results coincide well in the whole bandwidth.

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A compact wideband hybrid ring for S-band pulsed and CW applications

Cited by 2 publications

References 11 publications

A compact and wideband rat-race coupler using two-section ring and artificial transmission lines

A compact and wideband rat-race coupler using two-section ring and artificial transmission lines

Wideband microstrip antenna array with simultaneously low sidelobe level in both sum and difference patterns

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