A Simple Filtering-Antenna With Compact Size for Wlan Application

Abstract

Abstract-This paper presents a simple microstrip filtering-antenna with compact size for WLAN application. The T-shape resonator through an inset coupling structure can be treated as the admittance inverter and the equivalent circuit of the filtering-antenna is exactly the same as the bandpass filter prototype. With a little extra circuit area, the proposed filtering-antenna has almost twice wider bandwidth, good skirt selectivity and high suppression in the stopband compared to the conventional microstrip antenna.

Microstrip antennas for X‐band and MM‐wave frequencies based on diamond shape defected ground structure and size extension method

“…On the other hand, various defected ground structures have been reported in the literature which exhibit very attractive resonant properties and they have been widely used in the fundamental mode microstrip antennas and filters designs to miniaturize their size as well as to improve their efficiency and frequency response at microwave frequencies. In the recent years, several attempts have been made to integrate microstrip antenna and band pass filter by using various techniques . In Ref.…”

“…In Ref. , a simple but very efficient filtering microstrip antenna is designed at 5GHz frequency based on a circular patch and a T‐shape microstrip transmission line (TL) which are mutually coupled through an inset feeding line. In Ref.…”

“…However, the fine antenna pattern in Ref. and the complex multi‐layer antenna structure in Ref. make them unfeasible for higher frequency implementations.…”

Co-Design of a Compact Dual-Band Filter-Antenna for Wlan Application

“…By using an extra impedance transformation structure between the filter and the antenna, the bandpass filter can be integrated properly with the antenna over the required bandwidth [7]. Recently, a co-design approach has been proposed to incorporate the filter and the antenna [8][9][10]. This integration approach reduces the filter-antenna size and the transmission loss between the filter and the antenna.…”

Filtering Power Divider Based on Lumped Elements

“…To realize multiple functions within limited circuit size, miniaturization of RF components becomes extremely important. One method for size reduction is to design multiple function devices, which integrate two or more functions into one device [1][2][3]. Using this method, the number of components can be reduced and thus the circuit area can be reduced.…”