A reflection type of MSW signal-to-noise enhancer in the 400-MHz band

We have developed a reflection type of signal-to-noise enhancer operating in the 400-MHz band, which can easily be inserted into the second IF stage used in current DBS receivers. The new enhancer consists of a microstrip line using a ceramic substrate with a high dielectric constant and a LaGa-YIG film with low saturation magnetization. Enhancement of 8 dB was achieved in the 40-MHz bandwidth. We evaluated the effect of the new enhancer on noise reduction in DBS reception and found that the signal-to-noise enhancer achieved 2 to 3-dB noise reduction.<<ETX>>