Abstract:
The present disclosure discloses a method for adjusting one or more LO frequencies in a receiver. The receiver performs down conversion on a received signal through one or more mixers by using the one or more LO frequencies, and outputs one or more symbols through an ADC. The method comprising the steps of: for each of the one or more LO frequencies, estimating a new LO frequency corresponding to a best signal quality of the received signal; and adjusting the LO frequency into the new LO frequency. The present disclosure also relates to a receiver for adjusting one or more LO frequencies.
Abstract:
The present disclosure is directed to a balun circuit (100, 200, 300) adapted to operate at a frequency of between about 5 GHz to about 110 GHz. The balun circuit includes first (120, 220, 320) and second (130, 230, 330) output striplines and an input stripline (110, 210, 310) formed on a first surface of the substrate (101, 201, 301), and a slotline (140, 240, 340) formed on a second surface of the substrate opposite the first surface. The slotline has first (144, 244, 344) and second (146, 246, 346) ends, the first end overlapping the first output stripline and the second end overlapping the second output stripline, and the input stripline overlapping the slotline midway between the first end and the second end.
Abstract:
The present disclosure is directed to a balun circuit (100, 200, 300) adapted to operate at a frequency of between about 5 GHz to about 110 GHz. The balun circuit includes first (120, 220, 320) and second (130, 230, 330) output striplines and an input stripline (110, 210, 310) formed on a first surface of the substrate (101, 201, 301), and a slotline (140, 240, 340) formed on a second surface of the substrate opposite the first surface. The slotline has first (144, 244, 344) and second (146, 246, 346) ends, the first end overlapping the first output stripline and the second end overlapping the second output stripline, and the input stripline overlapping the slotline midway between the first end and the second end.
Abstract:
The invention relates to a 6-phase direct delta-sigma receiver comprising a forward signal path comprising a first and second integrator stage, wherein signal paths of both stages are divided into three signal paths. Each path of the first integrator stage comprises an N-path filter mixer, wherein inputs of the N-path filter mixer and an RF transconductance amplifier (Gm) of the second integrator stage are connected to an RF signal input. Each path of the second integrator stage comprises a downconversion mixer connected to the output of the Gm, at least one baseband amplifier stage connected to the output of the downconversion mixer, and a quantizer connected to the output of said at least one baseband amplifier stage. The downconversion mixer is arranged to downconvert an RF signal to a baseband signal and the quantizer is arranged to produce a digital version of the forward signal path output. The invention further relates to a method of filtering an RF signal using a direct delta-sigma receiver.
Abstract:
The present disclosure is directed to a balun circuit (100, 200, 300) adapted to operate at a frequency of between about 5 GHz to about 110 GHz. The balun circuit includes first (120, 220, 320) and second (130, 230, 330) output striplines and an input stripline (110, 210, 310) formed on a first surface of the substrate (101, 201, 301), and a slotline (140, 240, 340) formed on a second surface of the substrate opposite the first surface. The slotline has first (144, 244, 344) and second (146, 246, 346) ends, the first end overlapping the first output stripline and the second end overlapping the second output stripline, and the input stripline overlapping the slotline midway between the first end and the second end.
Abstract:
A transceiver with a spectrum sensing unit configured to detect, within a plurality of millimeter wave bands, one or more channels with tolerably low interference for selection. The transceiver has a transmitter configured to modulate a transmit signal to an output transmit signal using a transmit carrier frequency compatible with a transmit channel selected from the one or more channels, and using a transmit duplexing operating mode compatible with a transmit millimeter wave of the plurality of millimeter wave bands that correspond to the transmit channel. The transceiver has a receiver configured to demodulate a receive signal from an input receive signal using a receive carrier frequency compatible with a receive channel selected from the one or more channels, and using a receive duplexing operating mode compatible with a receive millimeter wave of the plurality of millimeter wave bands that correspond to the receive channel. The transceiver has a duplexer configured to route the output transmit signal from the transmitter based on the transmit duplexing operating mode and the transmit millimeter wave band, and the input receive signal to the receiver based on the receive duplexing operating mode and the receive millimeter wave band.