Premium
A low‐profile dual‐band shorted patch antenna with enhanced‐bandwidth and multifunctional beams under reshaped modes
Author(s) -
Liu NengWu,
Liang YuDong,
Zhu Lei,
Zhou Hao,
Fu Guang
Publication year - 2021
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22726
Subject(s) - broadside , bandwidth (computing) , optics , radiation , microstrip antenna , beam (structure) , multi band device , patch antenna , electrical impedance , microstrip , materials science , attenuation , physics , optoelectronics , antenna (radio) , telecommunications , computer science , quantum mechanics
A low‐profile dual‐band shorted patch antenna (SPA) with bandwidth‐enhancement and multifunctional beams is proposed in this article. Initially, the radiation patterns of the traditional SPA are extensively studied. It demonstrates that the radiated fields of its TM 1/2,0 , TM 3/2,0 , and TM 3/2,1 modes are unsuitable to be employed for multibeam radiation. As such, a pair of shorting pins2 is loaded underneath the radiating patch, aiming to transform the broadside‐beam of TM 1/2,0 mode into the dual‐beam. After that, a set of shorting pins3 is placed to reshape radiated fields of its TM 3/2,0 and TM 3/2,1 modes as the dual‐beam and broadside‐beam, respectively. Meanwhile, the resonant frequencies of its TM 1/2,0 and TM 1/2,1 modes are reallocated closely to that of TM 3/2,0 and TM 3/2,1 modes. With these arrangements, both of impedance bandwidth and radiation beams are enhanced under quadruple‐mode resonance. Finally, the proposed SPA is fabricated and measured. The results illustrate that the microstrip patch antenna has successfully obtained an enhanced‐bandwidth (|S 11 < −10 dB) ranging from 4.0 to 4.29 GHz and 5.24 to 5.77 GHz with two in‐band attenuation poles. Besides, a small thickness of about 0.04 free‐space wavelength is still maintained, while keeping single‐layer and single‐fed properties. Most importantly, the proposed SPA has generated desired broadside−/dual‐beam radiation patterns over the operating bands.