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This paper describes the design and realization of a low noise amplifier (LNA) at 410MHz. A balanced amplifier structure which consists of hybrid coupler and amplifier has been used to realize this LNA. This approach gives the advantage of good voltage standing wave ratio, higher linearity and good stability. Noise figure of 1dB with a flatness of 0.5 dB and input-output return losses better than-15dB...
A x10 active frequency multiplier has been presented at an output frequency of 1.5GHz. The unwanted harmonics have been rejected sufficiently by the use of idler circuits. BJT BFY-193 is used as an active non-linear device and the circuit is implemented on 25mil alumina MIC substrate. The conversion loss of 10.0dB is obtained with a rejection of 20dBc at 9th & 11th harmonics. The circuit has a...
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