Claims
- 1. A 180 degree hybrid comprising:
- a first input to receive an RF signal;
- means for splitting said RF signal coupled to said first input;
- positive phase shift means for shifting a first of said split signals in phase approximately +45 degrees;
- negative phase shift means for shifting a second of said split signals in phase approximately -135 degrees;
- said negative phase shift means comprising a transmission line and a capacitive element;
- said positive phase shift means and said negative phase shift means coupled to said means for splitting;
- said positive phase shift means and said negative phase shift means further coupled to first and second outputs, respectively;
- said transmission line and said capacitive element coupled in series between said positive phase shift means and said second output; and
- a means for isolating said split signals, said means for isolating coupled to said first and second outputs.
- 2. A 180 degree hybrid according to claim 1 wherein said isolation means comprises:
- first and second transmission lines;
- said first and second transmission lines coupled to said first and second outputs respectively; and
- said first and second transmission lines coupled to a second input.
- 3. A 180 degree hybrid comprising:
- a first input to receive an RF signal;
- means for splitting said RF signal coupled to said first input;
- positive phase shift means for shifting a first of said split signals in phase approximately +45 degrees;
- negative phase shift means for shifting a second of said split signals in phase approximately -135 degrees;
- said positive phase shift means comprising a capacitive element;
- said positive phase shift means and said negative phase shift means coupled to said means for splitting;
- said positive phase shift means and said negative phase means further coupled to first and second outputs, respectively;
- said capacitive element coupled between said negative phase shift means and said first output; and
- a means for isolating said split signals, said means for isolating coupled to said first and second outputs.
- 4. A broadband hybrid comprising:
- an in-phase combiner/divider;
- first lumped element phase shift means comprising a capacitor coupled to a first port of said in-phase combiner divider,
- second lumped element phase shift means coupled to a second port of said in-phase combiner;
- an input coupled to said capacitor and to said second lumped element phase shift means;
- said input splitting an input RF signal between said capacitor and said second lumped element phase shift means;
- said capacitor and said second lumped element phase shift means creating a 180.degree. phase differential between said split input signals; and
- said capacitor and said second lumped element phase shift means coupled to first and second outputs, respectively.
- 5. A broadband hybrid according to claim 4 wherein said capacitor supplies a 45 degree phase shift in a first of said split RF signals.
- 6. A broadband hybrid according to claim 4 wherein said second lumped element phase shift means comprises means for supplying a negative 135 degree phase shift in one of said split RF signals.
- 7. A broadband hybrid according to claim 6 wherein said second lumped element phase shift means comprises:
- a quarter-wave length delay line;
- a capacitor; and
- said quarter-wave length delay line and said capacitor coupled in series between said input and one of said plurality of outputs.
- 8. A broadband hybrid comprising:
- an in-phase combiner;
- first lumped element phase shift means coupled to a first port of said in-phase combiner;
- second lumped element phase shift means including a quarter-wave length delay line and a capacitor;
- said capacitor coupled to a second port of said in-phase combiner;
- said quarter-wave length delay line coupled to said capacitor;
- an input coupled to said first lumped element phase shift means and to said quarter-wave length delay line;
- said input splitting an input RF signal between said first lumped element phase shift means and said quarter-wave length delay line;
- said second lumped element phase shift means supplying a negative 135 degree phase shift in a first of said split input RF signals;
- said first and second lumped element phase shift means creating a 180.degree. phase differential between said split input signals; and
- said first and second lumped element phase shift means coupled to first and second outputs respectively.
- 9. A broadband hybrid according to claim 8 wherein said first lumped element phase shift means comprises a capacitor.
- 10. A broadband hybrid according to claim 8 wherein said first lumped element phase shift means comprises means for supplying approximately a 45 degree phase shift in one of said split RF signals.
Parent Case Info
This is a continuation-in-part of application Ser. No. 319,037, filed Mar. 6, 1989, abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (2)
Number |
Date |
Country |
101641 |
Aug 1979 |
JPX |
43412 |
Feb 1988 |
JPX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
319037 |
Mar 1989 |
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