Abstract

This paper represents the design and analysis of the Microstrip wideband integrated low noise amplifier Bandpass filter for the frequency range of 0.8 GHz to 2.7 GHz. This frequency range is chosen for the design as most of the wireless applications work in this frequency range. The paper uses the compact design structure for designing the wideband filter from ref [5]. The filter has good performance in pass band as well as in stopband of the filter. The filter has the compact size and higher selectivity of 0.923 and the input return loss below 10 dB and the output return loss less than 10 dB for the whole frequency range. The integrated low noise amplifier is from the analog devices ADL5544 which has the gain of 15 dB at 0.8GHz and the gain roll of 2 dB in the whole frequency band of the filter. The filter hardware is fabricated and tested with the network analyzer from Rohde & Schwarz model no ZVH8 which can measure from 100 KHz to 8 GHz. The simulated and the measured results are in good agreement with each other.

Highlights

  • In 2002 the Federal communication Commission(FCC) set the frequency range of the ultrawideband (UWB) as the frequency from 3.1 GHz to 10.6 GHz

  • The hardware results are tested on the Vector network Analyzer (VNA) (Vector network analyzer) which can test the circuit up to 8 GHz

  • The filter has the good performance in the pass band as well as in stopband

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Summary

Introduction

In 2002 the Federal communication Commission(FCC) set the frequency range of the ultrawideband (UWB) as the frequency from 3.1 GHz to 10.6 GHz. Various designs of filters were designed like ring filters multi- mode resonators as shown in ref[1], [2], [3], [4]. The requirement slowly started shifting to the compactness with the good performance in the pass band as well in stopband. Later the multi-mode resonators were used which were able to give good performance in passband but smaller stopband ref [1], [2]. The actual motivation to design the band pass filter for any application is to save the time and the money required for the designing and fabricating the various filters for different applications which are running on different frequencies. Just that the frequency of operation of the application should be in the passband of the Bandpass filter Adding to this the gain of the Bandpass filter should be as maximum as possible

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