Isolating circuit and dielectric filter for use therein

Details Isolating circuit and dielectric filter for use therein Isolating circuit and dielectric filter for use therein

1989-06-15

1991-05-14

LaRoche, Eugene R.

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333202, 333206, H01P 1213, H01P 1202

Patent

active

050159747

ABSTRACT:
An isolating circuit, which isolates a first frequency signal in a first frequency range and a second frequency signal in a second frequency range which is higher than the first frequency range, has as antenna terminal, a first filter and a second filter. The first filter, having a first input terminal and a first output terminal, receives a first input signal including the first frequency signal at the first input terminal and attenuates first frequency component of the first input signal below the first frequency range at a first attenuation rate and second frequency components of the first input signal above the first frequency range at a second attenuation rate. One of the first input and output terminals of the first filter is coupled to the antenna terminal. The first filter further has a first setting terminal setting the first attenuation rate and the second attenuation rate so that the second attenuation rate is greater than the first attenuation rate. The second filter, having second input and output terminals, receives a second input signal including the second frequency signal at the second input terminal and attenuataes third frequency components of the second input signal below the second frequency range at a third attenuation rate and fourth frequency components of the second input signal above the second frequency range at a fourth attenuation rate. One of the second input and output terminals of the second filter is coupled to the antenna terminal. The second filter further has a second setting terminal setting the third attenuation rate and fourth attenuation rate so that the third attenuation rate is greater than the fourth attenuation rate.

REFERENCES:
patent: 4342972 (1982-08-01), Nishikawa et al.
patent: 4382238 (1983-05-01), Makimoto et al.
patent: 4673902 (1987-06-01), Takeda et al.
patent: 4692726 (1987-09-01), Green et al.
patent: 4740765 (1988-04-01), Ishikawa et al.
patent: 4742562 (1988-05-01), Kommrusch
patent: 4768003 (1988-08-01), Kawakami et al.
patent: 4799033 (1989-01-01), Igarashi et al.
Atsushi Fukasawa, "Analysis and Composition of a New Microwave Filter Configuration with Inhomogeneous Dielectric Medium," IEEE Transactions on Microwave Theory and Techniques, vol. MTT-30, No. 9, Sep. 1982, pp. 1367-1375.
"Dielectric Filter with Attenuation Pole for Mobile Radio"; Electron Information Communication Society, CAS 88-10, dated Jun. 23rd, 1988.

Affiliated with

Also associated with

Rating

Isolating circuit and dielectric filter for use therein does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Isolating circuit and dielectric filter for use therein, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isolating circuit and dielectric filter for use therein will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1651311