A Design and Analysis of Compact Microstrip Bandpass filter with Integrated LNA for 0.8 to 2.7 GHz

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 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.