Development of a low-cost microwave filter antenna for 4G and 5G wireless network

Abstract

This paper is aimed at designing an antenna with filtering features and properties also called resonator filter antenna covering 850MHz to 3.1GHz and is suitable for WIFI applications. The problem of unwanted noise signals affects effective communication. Signal interferences affect signal quality and thus hinder effective voice communication. This paper collates signal-to- noise ratio, signal quality, return loss and signal strength among other signals of the Base transceiver station. It was observed that signal-to-noise ratio was relatively poor. Various factors could be attributed like poor filtering feature at the frontend of the Base transceiver station and lack of integration of the filter and antenna as in conventional communication systems where its front end contains an antenna and a separate tuning circuit ( filtering or filter circuit). The integration of the antenna and filter increases its efficiency. In this paper, an antenna is integrated with a filter at the front end to improve signal quality and reduce noise interferences. A three-pole filter antenna is developed at 2.4GHZ and a two-pole filter antenna is also designed to cover frequencies ranging from 850MHz to 3.1GHz. They are both simulated using High-frequency structure simulator software. The dual filter antennas are measured and results show that the antenna filter performances are excellent.