Low noise block downconverter

Details Low noise block downconverter Low noise block downconverter

1996-07-30

1999-11-30

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

455307, H04B 110

Patent

active

059958189

ABSTRACT:
A small elliptic high pass filter is incorporated into a low noise block downconverter (LNB) to reject image frequencies in a 12 GHz Direct home satellite television Broadcasting System (DBS). A waveguide transition with separate electric probes receives Ku-band satellite signals and transmits the signals to low noise amplifiers (LNAs), a power combiner, an elliptic high pass filter, and a HEMT MMIC receiver. Within the HEMT MMIC receiver, the signal is passed through an RF amplifier stage. A mixer mixes the signal from the RF amplifier stage with a local oscillator signal to produce an intermediate frequency (IF). An IF amplifier stage amplifies the IF signal which is further processed by a television decoder box. Due to the unique response of the elliptic high pass filter, the elliptic high pass filter provides a superior image rejection with lower insertion loss for the LNB, and therefore provides improved television reception quality.

REFERENCES:
patent: 4287602 (1981-09-01), Kessler
patent: 4488130 (1984-12-01), Young et al.
patent: 4563773 (1986-01-01), Dixon, Jr. et al.
patent: 4654885 (1987-03-01), Meszko et al.
patent: 4691376 (1987-09-01), Watanabe et al.
patent: 4696055 (1987-09-01), Marshall
patent: 4723318 (1988-02-01), Marshall
patent: 4754465 (1988-06-01), Trimble
patent: 4876737 (1989-10-01), Woodworth et al.
patent: 4876739 (1989-10-01), Ma et al.
patent: 4914408 (1990-04-01), Voorman
patent: 5017897 (1991-05-01), Ooi et al.
patent: 5027430 (1991-06-01), Yamauchi et al.
patent: 5060297 (1991-10-01), Ma et al.
patent: 5119509 (1992-06-01), Kang
patent: 5125109 (1992-06-01), Geller et al.
patent: 5125110 (1992-06-01), Nusair
patent: 5142698 (1992-08-01), Koga et al.
patent: 5263182 (1993-11-01), Park
patent: 5263187 (1993-11-01), Sugawa et al.
patent: 5276904 (1994-01-01), Mutzig et al.
patent: 5303403 (1994-04-01), Leong
patent: 5319329 (1994-06-01), Shiau et al.
patent: 5323064 (1994-06-01), Bacon et al.
patent: 5323332 (1994-06-01), Smith et al.
patent: 5325401 (1994-06-01), Halik et al.
patent: 5345591 (1994-09-01), Tsurumaki et al.
patent: 5369793 (1994-11-01), Vincent
patent: 5428837 (1995-06-01), Bayruns et al.
patent: 5437051 (1995-07-01), Oto
patent: 5465420 (1995-11-01), Dougherty et al.
patent: 5493303 (1996-02-01), Kolak
patent: 5528769 (1996-06-01), Berenz et al.
patent: 5548813 (1996-08-01), Charas et al.
patent: 5575001 (1996-11-01), Ku
patent: 5583891 (1996-12-01), Espe et al.
patent: 5584064 (1996-12-01), Nakamura
patent: 5630225 (1997-05-01), Corman
Wallace et al., A low cost high performance MMIC low noise downconverter for direct broadcast satellite reception, IEEE 1990 Microwave and Millimeter-WAve Monolithic Circuits Symposium, pp. 7-10, Jun. 1988.

Affiliated with

Also associated with

Rating

Low noise block downconverter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low noise block downconverter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low noise block downconverter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1686141