Coupling and isolation in microstrip patch antenna
Answers
Answer:
A mutual coupling reduction method for closely installed patch antenna (PA) and microstrip transmission line (MTL) is proposed by means of defected isolation wall structure (DIWS) which is comprised of a metal patch with periodically G-shaped structure and two dielectric substrate sheets set on both sides of the metal patch. The DIWS model, design procedure and investigation on its stop filtering characteristics are presented. Also, the dominant parameters of DIWS are discussed in order to flexibly adjust the stop band to meet the frequency band that we are interested in. Finally, the optimized DIWS is installed on the closely set PA and MTL with a distance of 2 mm to suppress the mutual coupling. The proposed structure is fabricated and measured to verify the simulation results which demonstrated that a high isolation of 27 dB and 37 dB between the antenna and MTL are achieved, respectively. Index Terms ─ Coupling reduction, DIWS, antenna and microstrip transmission line, band stop filtering.
Explanation: