Dual‐resonance‐based wideband antenna for integrated module applications

Abstract

A wideband module antenna comprised of a small ground radiation antenna in the module and a parasitic radiation loop in the evaluation board is proposed. Unlike conventional ground radiation antennas, the ground radiation antenna in the module works as an exciter to the parasitic radiation loop, which further couples with the evaluation board as a radiator. Thus, a space-saving antenna is obtained with wide bandwidth and easy tuning. Accordingly, dual resonance can be generated by tuning the resonant frequencies of the ground radiation antenna and the parasitic radiation loop equally. When measured, the antennas have wide bandwidths (2:1 voltage standing wave ratio bandwidth of 270 MHz) and high efficiency (ranging from 44 to 74%).

Impedance Bandwidth Enhancement Using Capacitor-Controlled Series Resonance in an Antenna’s Feeding Structure

“…Table 1 reveals the comparison results of the proposed antenna with previous studies in terms of antenna size, bandwidth, efficiency, operating frequency band, and type [5,8,9,11,16]. Fig.…”

“…Using endless metal rims around the ground plane can improve the antenna's performance [8]. Alternatively, placing a large evaluation board under the antenna and using a magnetic field to excite the board's resonance would also achieve the expected increase in impedance bandwidth [9]. Furthermore, the planar slot antenna's feeding structure is designed with a modified coplanar waveguide (CPW) feeding line for tuning and optimization to achieve a wide impedance bandwidth [10].…”