HIGH FREQUENCY MEASUREMENT APPARATUS AND METHOD WITH LOAD PULL
First Claim
1. Measurement apparatus for measuring the response of an electronic device to a high frequency input signal, the measurement apparatus including:
- an active load-pull circuit connectable in use to an electronic device to be measured, whereinthe active load-pull circuit includes a passive load-pull device.
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Accused Products
Abstract
The present invention relates to a measurement system and method for analysing, and characterising, the behaviour of a high frequency device, commonly referred to in the art as a device under test (or DUT) at relatively high power levels. Such devices may for example need to be analysed when designing devices or designing circuits utilising such devices, for use in high power (large signal) high frequency amplifiers, such as an amplifier for use in a mobile telephone network or other telecommunications-related base-station. The measurement apparatus for measuring the response of an electronic device to a high frequency input signal includes an active load-pull circuit connectable in use to an electronic device to be measured. The active load-pull circuit includes a passive load-pull device.
38 Citations
27 Claims
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1. Measurement apparatus for measuring the response of an electronic device to a high frequency input signal, the measurement apparatus including:
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an active load-pull circuit connectable in use to an electronic device to be measured, wherein the active load-pull circuit includes a passive load-pull device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 21, 22, 23, 24, 25)
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16. A method of measuring the response of an electronic device under test to a high frequency input. signal, the method including the following steps:
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providing a device under test having one or more ports, providing a microwave frequency signal sampling apparatus measurement apparatus connected to take measurements from at least one of said ports, using an active load pull circuit to apply an active load at at least one of said ports, the active load including a signal having a low-frequency or DC component, a high-frequency component at a fundamental frequency, and a high-frequency component at a harmonic frequency, the active load being provided via one or more signal paths, providing a passive tuner component in at least one of said one or more signal paths, simultaneously controlling the load applied to the device at the fundamental frequency and at a harmonic frequency, and setting the reflection coefficient at the fundamental frequency by using at least one such passive tuner component to change the characteristic impedance of the active load circuit at the fundamental frequency, thus reducing the electric power of the signals required to be generated by the active load pull circuit. - View Dependent Claims (17, 18, 19, 20, 26, 27)
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Specification