Wideband and compact microstrip tapered balun with circular slot and double dielectric layer

Gook, Seung; Park, Chan Ju; Yoon, Young Joong; Kim, Hyungrak

doi:10.1109/apusncursinrsm.2017.8072416

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…However, the four-arm sinuous antenna is disadvantageous for wideband operation because of the loss due to the need for a long wideband balun for high input impedance ( 267) [11], [12]. To address these flaws, various miniaturization techniques for the balun have been investigated [13], [14]. However, these techniques are not appropriate for use in sinuous antennas because it deteriorates the baluns' balancing properties, which adversely impact the antenna performance.…”

Section: Introductionmentioning

confidence: 99%

Four-Arm Sinuous Antenna With Low Input Impedance for Wide Gain Bandwidth

Kim

Park

Kim³

et al. 2022

IEEE Access

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An improved method of reducing the input impedance of a four-arm sinuous antenna is demonstrated for a wide gain bandwidth. The proposed antenna has a dual-linear polarized response for electronic support measures (ESM) systems and is designed with a planar substrate. The structure for reducing the input impedance is developed based on the transmission and coupled line theory and is shown to be in excellent agreement with theoretical predictions. The proposed antenna achieves an impedance bandwidth in the range of 0.45-6 GHz with a reference impedance of 100 . Simulations for comparison according to the difference in input impedance of designed antennas with feeding structures are also presented. Finally, the performance of the fabricated antenna with wideband balun is verified by measuring co-and cross-polarization radiation patterns. As a result, the proposed antenna achieves a wide gain bandwidth (>2.5 dBi) and a cross-polarization isolation (>−13 dB) of more than 12:1 in the frequency range over 0.6 GHz, which can be used in ESM systems.INDEX TERMS Four-arm sinuous antenna, low input impedance, electronic support measures, wide gain bandwidth.

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Section: Introductionmentioning

confidence: 99%