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A compact microstrip combline filter for microwave S-band
, Article 29th Iranian Conference on Electrical Engineering, ICEE 2021, 18 May 2021 through 20 May 2021 ; 2021 , Pages 891-894 ; 9781665433655 (ISBN) ; Memarian, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2021
Abstract
In this paper, a wideband coupled-resonator microstrip bandpass filter is designed and experimentally demonstrated in the S-Band. The filter is comprised of quarter-wavelength hair-pin resonators, reducing resonator and filter footprint compared to conventional hairpin designs. Additionally, it is considerably forgiving to fabrication tolerances and yields remarkably close matched results between theory, simulation, and measured results. One demonstration presented has minimal insertion loss ${(< 1{dB})}$ for the entire wide bandwidth of 3.4 GHz to 4.2 GHz. Wider bandwidths up to 60% are also observed using the design. The proposed filter is an attractive solution when space is a critical...
A single-fed circularly-polarized elliptical slot antenna for s-band applications
, Article 30th International Conference on Electrical Engineering, ICEE 2022, 17 May 2022 through 19 May 2022 ; 2022 , Pages 166-169 ; 9781665480871 (ISBN) ; Janforooz, M ; Rasoulpour, B ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2022
Abstract
In this paper, a single-fed, circularly-polarized printed antenna with an elliptical slot for S-band application is suggested. The antenna structure includes a circular patch radiator having one rotated elliptical slot which feeds through a microstrip line. The circular polarization is obtained by adjusting the major axis of the elliptical slot. A metallic circular ground and four 80° slices of a wide ring-shaped patch surrounding the main radiator improve impedance matching bandwidth and circular polarization performance. The suggested antenna has a left-handed circularly polarized (LHCP) with an acceptable axial ratio that is in agreement with S-band applications. For verification of the...