Polarity reversal network

Details Polarity reversal network Polarity reversal network

1996-11-27

1998-07-14

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333203, 333212, H01P 120, H01P 1205

Patent

active

057810850

ABSTRACT:
A polarity reversal network is provided for a microwave filter that includes a plurality of resonators. The polarity reversal network has a magnetic coupling device that is positioned within an iris of the filter between a pair of the resonators. The coupling device is tunable to adjust its resonant frequency and is used to magnetically couple a signal from a first one of the pair of resonators to a second one of the pair of resonators. The coupling device also reverses the polarity of the magnetically-coupled signal upon the resonant frequency being tuned below a passband frequency of the microwave filter. As a result, the polarity of the signal resembles that of a capacitively-coupled signal.

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