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The Novel W Parasitic Strip for the Circularly Polarized Microstrip Antennas Design and the Mutual Coupling Reduction between Them
摘要： This paper presents a novel W shaped parasitic strip to design the circularly-polarized (CP) simultaneous transmit and receive (STAR) antennas and reduce the mutual coupling (MC) between them. By disturbing the current fields and inducing the current distribution on the antenna patches, the CP radiation and MC reduction are achieved. The designed CP antennas have 30 MHz 10-dB impedance bandwidth, 16 MHz 3-dB AR bandwidth and approximate 5.08 dBic peak CP gain. This technique also reduce the MC from ?7 dB to ?50 dB when the antennas are placed with a 0.18 λ0 center-to-center distance and a 0.033 λ0 edge-to-edge distance, where λ0 is the free-space wavelength. When achieving the MC reduction, the antenna radiation pattern restores to that of the isolated antenna. Furthermore, the antenna CP gain and efficiency is improved comparing those of the antenna without the parasitic strip or the classic corner cut CP antenna.
关键词： closely spaced,circularly polarized,Mutual coupling reduction,parasitic strip
更新于2025-09-23 15:21:21
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MUTUAL COUPLING REDUCTION BETWEEN PRINTED DUAL-FREQUENCY ANTENNA ARRAYS
摘要： A new defected ground structure (DGS) is designed to reduce the mutual coupling of a dual-frequency printed monopole array. The designed dual-frequency DGS consists of two concentric split ring slots. Each split ring slot produces band rejection characteristics at one resonant frequency of the antennas. An e?ective equivalent circuit model of the DGS section is proposed with the circuit parameters successfully extracted. Good agreement exists among the circuit simulation, EM simulation and experimental results. With the inclusion of the DGS, the measured mutual coupling of the dual-band array has been e?ectively reduced by 10 dB and 20 dB at two resonant frequencies, respectively.
关键词： dual-frequency printed monopole array,equivalent circuit model,defected ground structure (DGS),mutual coupling reduction
更新于2025-09-09 09:28:46
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[IEEE 2018 7th International Conference on Computer and Communication Engineering (ICCCE) - Kuala Lumpur, Malaysia (2018.9.19-2018.9.20)] 2018 7th International Conference on Computer and Communication Engineering (ICCCE) - The 2 <sup>*</sup> 1 Microstrip Antenna Array with Low Coupling using Periodic Paperclip-shaped Slots
摘要： The periodic paperclip-shaped (PPS) structure has been employed to suppress strong mutual coupling between antenna elements for microstrip antenna array in MIMO wireless communication system. The special decoupling structure consists of three paperclip-shaped units periodically placed at the centre of the two narrow patches with the adjacent patches spacing of 0.1λ (λ free space frequency), providing the bandstop characteristic to keep out the strong mutual coupling between antenna elements. By using the proposed special bandgap structure, more than 36 dB mutual coupling reduction between microstrip antenna elements is achieved at the centre frequency 5.0 GHz without any resonant frequency shift. Note that inserting periodic paperclip-shaped structure could concentrate on strong power towards the particular side by changing current distribution and propagation direction, so the slight gain enhancement has been obtained by comparing to the antenna array without PPS structure. Additionally, this PPS structure is also suitable for antenna array with other frequency by adjusting size of the PPS structure.
关键词： periodic paperclip-shaped structure,antenna array,mutual coupling reduction
更新于2025-09-04 15:30:14