Wideband multiple channel frequency converter
First Claim
1. A wideband multiple channel frequency converter comprising:
- a mixer, having a first input for receiving a signal to be converted and a second input for receiving a local oscillator signal;
a frequency generator for generating a local oscillator signal;
a power divider for receiving the local oscillator signal, providing a portion of the local oscillator signal to the second input of said mixer and providing a portion of the local oscillator signal to a feed forward path;
a feed forward path for phase and amplitude adjusting the signal received from said power divider;
a power combiner for receiving and combining a signal output from said mixer and a phase and amplitude adjusted signal output from said feed forward path.
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Accused Products
Abstract
A wideband multiple channel frequency converter includes a mixer, a frequency generator for generating a local oscillator signal, a power divider for receiving the local oscillator signal and providing a portion of the signal to the mixer and a portion of the signal to a feed forward path which phase and amplitude adjusts the signal and a power combiner for receiving and combining a signal from the mixer and the phase and amplitude adjusted signal from the feed forward path. In addition, an attenuator may be implemented to reduce a power level of a signal to be converted and a band-pass filter may receive the signal from the power combiner. The converter compensates for local oscillator signal leakage and can reduce inter-modulation components.
41 Citations
20 Claims
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1. A wideband multiple channel frequency converter comprising:
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a mixer, having a first input for receiving a signal to be converted and a second input for receiving a local oscillator signal; a frequency generator for generating a local oscillator signal; a power divider for receiving the local oscillator signal, providing a portion of the local oscillator signal to the second input of said mixer and providing a portion of the local oscillator signal to a feed forward path; a feed forward path for phase and amplitude adjusting the signal received from said power divider; a power combiner for receiving and combining a signal output from said mixer and a phase and amplitude adjusted signal output from said feed forward path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A wideband multiple channel frequency converter capable of reducing inter-modulation components and local oscillator (LO) leakage components, comprising:
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(a) a variable attenuator for receiving an input signal and reducing a power level of the input signal; (b) a mixer for receiving a signal output from said variable attenuator; (c) an integrated frequency synthesizer for providing a local oscillator signal; (d) a linear amplifier for amplifying the local oscillator signal output from said integrated frequency synthesizer; (e) a power divider for receiving a signal output from said linear amplifier and providing a first output signal and a second output signal; (f) a first isolator for coupling the first output signal to said mixer and for preventing reverse coupling of signals from said mixer to said power divider; (g) a variable attenuator, coupled to said power divider, for reducing a power level of the second output signal from said power divider; (h) a phase shifter for phase adjusting a signal output from said variable attenuator; (i) a second isolator for coupling an output from said phase shifter to a power combiner and for preventing reverse coupling of signals from said power combiner to said phase shifter; (j) a power combiner for receiving and combining a signal output from said mixer and a signal output from said second isolator; (k) a band-pass filter for receiving a signal output from said power combiner and for rejecting unwanted modulated components; and (l) a linear amplifier for amplifying a signal output from said band-pass filter.
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Specification