A Novel Differential-Fed Patch Antenna on Stepped-Impedance Resonator With Enhanced Bandwidth Under Dual-Resonance
A novel design concept to enhance the bandwidth of a differential-fed patch antenna using the dual-resonant radiation of a stepped-impedance resonator(SIR)is proposed.The SIR is composed of two distinctive portions:the radiating patch and a pair of open stubs.Initially,based on the transmission line model,the first and second odd-order radiative resonant modes,i.e.,TM10 and TM30,of this SIR-typed patch antenna are extensively investigated.It is demonstrated that the frequency ratio between the dual-resonant modes can be fully controlled by the electrical length and the impedance ratios between the open stub and radiating patch.After that,the SIR-typed patch antenna is reshaped with stepped ground plane in order to increase the impedance ratio as highly required for wideband radiation.With this arrangement,these two radiative modes are merged with each other,resulting in a wide impedance bandwidth with a stable radiation pattern under dual-resonant radiation.Finally,the proposed antenna is designed,fabricated,and measured.It is verified in experiment that the impedance bandwidth(|Sdd11|<-10 dB)of the proposed antenna has gained tremen-dous increment up to 10%(0.85-0.94 GHz)with two attenuation poles.Most importantly,the antenna has achieved a stable gain varying from 7.4 to 8.5 dB within the whole operating band,while keeping low-cross polarization.
Differential-fed antenna dual-resonance odd-order modes stepped-impedance resonator(SIR) wide bandwidth
Neng-Wu Liu Lei Zhu Wai-Wa Choi Jin-Dong Zhang
Department of Electrical and Computer Engineering,Faculty of Science and Technology,University of Macau,Macau,China
国际会议
深圳
英文
27-34
2021-12-01（万方平台首次上网日期，不代表论文的发表时间）