Cascaded Square Loop Bandpass Filter With Transmission Zeros for Long Term Evolution (Lte)

Abstract

In this paper, we present a bandpass filter that passed frequency of 1.7 GHz – 1.8 GHz. It is applied for an uplink frequency in 4G 1800MHz. This filter is created by using substrate PCB TMM-10i and has a compact size of 42 mm x 42 mm. The compact size is also important besides selectivity. The selectivity is achieved by implementing cascade square loop resonator method which generated transmission zeros. Actually, transmission zeros are obtained from the coupled resonator. The bandpass filter is designed by adding an external resonator on each square of the resonator loop and a patch to the inside of the square loop resonator. The parameter performances are simulated by HFSS. The parameter performances for return loss value is 14.24 dB at frequency 1.75 GHz and insertion loss value is 0.65 dB at frequency 1.75 GHz. By using VNA Anritsu MS 2026A, prototype bandpass filter is measured. The measurement results for return loss value is 6.8 dB and insertion loss value is 2.2 dB.

Optimization in Quality of Service for Lte Network Using Bandwidth Expansion

“…LTE Network is a set of measurable events, parameters, and measurements that are used to gauge or compare performance in terms of meeting mobile network's strategic and operational goals (Andini et al 2018;Rahayu & Pohan, 2018); Cox, 2014). For a wireless system like the LTE, a set of Key Performance Indicators (KPIs) are defined for the evaluation of system performance, in particular, the performance of the evolved Radio Access Network (eRAN).…”