Vector network analyzer
First Claim
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1. A vector network analyzer comprising:
- (a) a radio frequency section having one and only one RF oscillator for generating an output RF sweep frequency signal, means for displaying said RF signal prior to its transmission to a device under test (DUT), and means for mixing a return RF signal from the DUT with the initial RF sweep frequency signal to produce an analog intermediate frequency (IF) signal;
(b) means for converting said analog IF signal to digital signals prior to further processing and analyzing of said analog signals; and
(c) means for processing and analyzing said digital signals to determine a reflection coefficient or a transmission coefficient.
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Abstract
A vector network analyzer utilizes a single voltage controlled oscillator to produce a sweep frequency over time, which is supplied to a device under test. The return signal from the device under test is delayed and mixed with the original signal to produce an intermediate frequency signal that is digitized and the data manipulated by a computer to measure the reflection coefficient or transmission coefficient of the device under test.
96 Citations
19 Claims
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1. A vector network analyzer comprising:
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(a) a radio frequency section having one and only one RF oscillator for generating an output RF sweep frequency signal, means for displaying said RF signal prior to its transmission to a device under test (DUT), and means for mixing a return RF signal from the DUT with the initial RF sweep frequency signal to produce an analog intermediate frequency (IF) signal; (b) means for converting said analog IF signal to digital signals prior to further processing and analyzing of said analog signals; and (c) means for processing and analyzing said digital signals to determine a reflection coefficient or a transmission coefficient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A vector network analyzer comprising:
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(a) a radio frequency (RF) section having one and only on RF oscillator for generating an RF sweep frequency signal;
means for splitting said RF signal into at least two channels, said two channels further comprising a test channel and a reference channel;
means for delaying said RF signals in said test channel and in said reference channel;
means for splitting said RF signal in said reference channel into a reference channel signal and a power signal channel;
means for mixing said RF signal to said reference channel with the return signal from said reference channel; and
means for mixing the RF signal to said test channel with the return signal through said test channel and from a device under test (DUT) to produce an analog intermediate frequency from said reference channel (RIF) and an analog intermediate frequency for said test channel (TIF);(b) a digital circuit section responsive to said RF section and comprising means for converting said RIF and said TIF signals from analog to digital signals prior to further processing and analyzing of said analog signals; (c) means for processing and analyzing said digital signals, said processing and analyzing means further comprising computer hardware and software; and (d) means for generating a voltage ramp signal for driving said RF oscillator. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification