Concurrent dual-band receiver architecture
AssigneeCalifornia Institute of Technology
InventorsSeyed-Ali Hajimiri, Seyed-Hossein Hashemi
Life of this patent
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Abstract
The present invention discloses an architecture for a concurrent dual-band high-frequency receiver. The invention combines a concurrent dual-band front-end subsystem having a dual-band antenna, dual-band pre-amplifier filter and concurrent dual-band LNA with a novel image rejection downconverter to provide the functions of a typical receiver, including reception, amplification and downconversion of a signal in two discrete desired frequency bands simultaneously.
Claims15
A concurrent, dual-band receiver that receives a signal at two desired frequency bands, simultaneously, comprising:
- (a) a concurrent, dual-band, front-end subsystem;
- and
- (b) a concurrent, dual-band, image-rejection, frequency downconverter.
A concurrent, dual-band, image-rejection downconverter for a concurrent dual-band RF receiver having a front-end subsystem that supplies a front-end signal having two discrete desired frequency bands and a transfer function with attentuation regions at frequency bands outside the two discrete desired frequency bands, comprising:
- (a) a first image-rejection downconversion stage that receives and that is adapted to simultaneously downconvert the front-end signal to two intermediate frequency (IF) bands such that the image frequency bands of the two desired frequency bands fall at the attenuation regions of the front-end transfer function;
- and
- (b) a subsequent image-rejection downconversion stage that downconverts the two IF bands.
A method of concurrently dowconvertering a dual-band RF signal, comprising:
- (a) providing a dual-band RF signal having a front-end transfer function having two desired frequency bands and attenuation notches at non-selected frequency bands;
- and
- (b) downconverting the RF signal such that the image frequencies of the two-bands fall at the attenuation notches of the front end transfer function.
Dependencies are inferred from the claim text.