Abstract
In this paper a metamaterial-inspired T-matching network is directly imbedded inside the feedline of a microstrip antenna to realize optimum power transfer between the front-end of an RF wireless transceiver and the antenna. The proposed T-matching network, which is composed of an arrangement of series capacitor, shunt inductor, series capacitor, exhibits left-handed metamaterial characteristics. The matching network is first theoretically modelled to gain insight of its limitations. It was then implemented directly in the 50- $\Omega $ feedline to a standard circular patch antenna, which is an unconventional methodology. The antenna’s performance was verified through measurements. With the proposed technique there is 2.7 dBi improvement in the antenna’s radiation gain and 12% increase in the efficiency at the center frequency, and this is achieved over a significantly wider frequency range by a factor of approximately twenty. Moreover, there is good correlation between the theoretical model, method of moments simulation, and the measurement results.
Highlights
Microstrip antennas have become popular for use in many wireless systems due to their planar profile, ease of fabrication and low manufacturing cost
This has been made possible by the design of flexible and compact transceivers especially in the sub-6 GHz band for wireless sensor networks (WSN), wireless local area networks (WLAN), public land mobile networks (PLMN) and 5G communication systems
Impedance bandwidth of an antenna is determined by the matching conditions between the RF transceiver front-end and the antenna
Summary
Microstrip antennas have become popular for use in many wireless systems due to their planar profile, ease of fabrication and low manufacturing cost. The use of planar based antenna configurations enables the integration of communication capabilities in a wide range of applications in the context of Industry 4.0 technologies such as Internet of Things (IoT) or vehicular communications, among others. This has been made possible by the design of flexible and compact transceivers especially in the sub-6 GHz band for wireless sensor networks (WSN), wireless local area networks (WLAN), public land mobile networks (PLMN) and 5G communication systems. The technique is first theoretically characterized to gain an understanding of its effectiveness and is validated through practical design and measurement
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