Quasi-gaussian filter

Details Quasi-gaussian filter Quasi-gaussian filter

1998-03-03

2000-04-04

Ham, Seungsook

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333167, H01P 518, H03H 700

Patent

active

060466545

ABSTRACT:
A low pass filter exhibiting low loss, low reflection, and Gaussian phase distortion characteristics at microwave and radio frequencies is provided. The low pass filter may comprise a negative feed forward network having a first directional coupler having a resonant frequency f.sub.0 and a second directional coupler having a resonant frequency f.sub.0, a through port of the first directional coupler being coupled to a through port of the second directional coupler, a coupled port of the first directional coupler being coupled to a coupled port of the second directional coupler, and an isolated port of the first directional coupler and an isolated port of the second directional coupler being terminated in matched loads. Additional embodiments employing multiple negative feed-forward networks are also disclosed.

REFERENCES:
patent: 3516024 (1970-06-01), Lange
patent: 3571739 (1971-03-01), Seidel
patent: 3771064 (1973-11-01), Hebert, Jr.
patent: 3967220 (1976-06-01), Tagashira
patent: 5838527 (1998-11-01), Lawrence et al.

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