Radio frequency multiplier producing an even harmonic output
First Claim
1. A frequency multiplier, having an input terminal fed by an input signal having a fundamental frequency fo and an output terminal, comprising:
- means, fed by the input signal, for providing first and second signals, each having the frequency fo ;
means for providing a differential phase shift of an odd multiple of 180°
between said first and second signals;
a first plurality of non-linear devices, each one thereof having an input electrode and an output electrode;
first means, fed by the first signal, for successively feeding said first signal, to the input electrodes of the first plurality of non-linear devices;
wherein in response to the first signal an output signal is provided at the output electrode of each non-linear device having frequency components fo, 2fo, 3fo . . . , nfo where n is a positive integer;
a second plurality of non-linear devices, each one thereof having an input electrode, and an output electrode;
second means, fed by the second signal, for successively feeding said second signal to the input electrodes of the second plurality of non-linear devices;
wherein response to the second signal an output signal is provided at the output electrode of each non-linear device having frequency components fo, 2fo, 3fo, . . . , nfo where n is a positive integer;
a radio frequency transmission line coupled to the output terminal and connected to the output electrode of each one of the first plurality of non-linear devices and the output electrode of each one of said second plurality of non-linear devices to couple each one of said signals to the output terminal; and
wherein the signal fed from each non-linear element of the first plurality of non-linear elements and the signal fed from each respective non-linear element of the second plurality of non-linear elements have a differential phase shift of odd multiples of 180°
for the fundamental frequency components of fo and odd harmonics of fo and a differential phase shift of even multiples of 180°
for even harmonics of fo to provide at the output terminal an output signal having at least one even harmonic of fo with substantially no frequency components at the fundamental frequency fo and odd harmonics of fo.
1 Assignment
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Accused Products
Abstract
A radio frequency multiplier circuit includes a first plurality of non-linear devices, each device having an input electrode and an output electrode. The input electrode of each one of the first plurality of non-linear devices is successively interconnected via a first input coupling means to a first input terminal. The multiplier further includes a second like plurality of non-linear devices, each device having an input electrode and an output electrode. The input electrode of each one of the second plurality of non-linear devices is successively interconnected via a second input coupling means to a second input terminal. A common output coupling means is provided to interconnect the output electrode of each one of the first plurality of devices with the output electrode of a corresponding one of the second plurality of devices. The multiplier further includes means for coupling a pair of signals having a 180° differential phase shift to the pair of input terminals. With this arrangement, an output signal having frequency components which are even harmonics of the frequency of the input signal is provided.
23 Citations
19 Claims
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1. A frequency multiplier, having an input terminal fed by an input signal having a fundamental frequency fo and an output terminal, comprising:
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means, fed by the input signal, for providing first and second signals, each having the frequency fo ; means for providing a differential phase shift of an odd multiple of 180°
between said first and second signals;a first plurality of non-linear devices, each one thereof having an input electrode and an output electrode; first means, fed by the first signal, for successively feeding said first signal, to the input electrodes of the first plurality of non-linear devices; wherein in response to the first signal an output signal is provided at the output electrode of each non-linear device having frequency components fo, 2fo, 3fo . . . , nfo where n is a positive integer; a second plurality of non-linear devices, each one thereof having an input electrode, and an output electrode; second means, fed by the second signal, for successively feeding said second signal to the input electrodes of the second plurality of non-linear devices; wherein response to the second signal an output signal is provided at the output electrode of each non-linear device having frequency components fo, 2fo, 3fo, . . . , nfo where n is a positive integer; a radio frequency transmission line coupled to the output terminal and connected to the output electrode of each one of the first plurality of non-linear devices and the output electrode of each one of said second plurality of non-linear devices to couple each one of said signals to the output terminal; and wherein the signal fed from each non-linear element of the first plurality of non-linear elements and the signal fed from each respective non-linear element of the second plurality of non-linear elements have a differential phase shift of odd multiples of 180°
for the fundamental frequency components of fo and odd harmonics of fo and a differential phase shift of even multiples of 180°
for even harmonics of fo to provide at the output terminal an output signal having at least one even harmonic of fo with substantially no frequency components at the fundamental frequency fo and odd harmonics of fo. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11, 12, 13, 14, 15, 16, 17)
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8. A frequency multiplier, having an input terminal fed by an input signal having a fundamental frequency fo and an output teminal, comprising:
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means fed by the input signal for providing first and second input signals each having the frequency fo, with said signals having a 180°
differential phase shift;a first plurality of field effect transistors biased to operate as non-linear elements, each one thereof having an input electrode, and an output electrode; first means, fed by the first input signal, for successively electrically interconnecting the input electrodes of the first plurality of field effect transistors, with a first input electrode being fed by a portion of said first input signal and succeeding input electrodes being fed by succeeding portions of said first input signal; a second plurality of field effect transistors biased to operate as non-linear elements, each one thereof having an input electrode, and an output electrode; second means, fed by the second input signal, for successively electrically interconnecting the input electrodes of the second plurality of field effect transistors, with a first input electrode being fed a portion of said second input signal and succeeding input electrodes being fed by succeeding portions of said second input signal; third means coupled to the output terminal for electrically interconnecting the output electrode of each one of the first plurality of field effect transistors with the output electrode of each respective corresponding one of said second plurality of field effect transistors; and wherein in response to the signal portions of said first and second input signals fed to the input electrodes of the first and second pluralities of field effect transistors, output signals are provided at each of the output electrodes thereof having frequency components fo, 2fo, 3fo, . . . nfo, with the fundamental component fo and odd harmonics thereof from each one of the first plurality of field effect transistors having an odd multiple of 180°
differential phase shift with the fundamental component fo and odd harmonics thereof from each respective one of the second plurality of field effect transistors and the even harmonics having an even multiple of 180°
differential phase shift, to provide a composite output signal at the output terminal having an even harmonic frequency component with substantially no frequency components at the fundamental frequency f0 and odd harmonics of f0. - View Dependent Claims (9, 10, 18, 19)
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Specification