Methods for characterizing tunable radio-frequency elements
First Claim
1. A radio-frequency test system for testing an adjustable antenna tuning element, comprising:
- a first signal generator that is configured to provide first radio-frequency signals at only a first frequency to the adjustable antenna tuning element;
a second signal generator configured to provide second radio-frequency signals at only a second frequency that is different than the first frequency to the adjustable antenna tuning element; and
a first load pull tuner coupled to the adjustable antenna tuning element;
a tester that is coupled to the adjustable antenna tuning element via a broadband radio-frequency coupler, wherein the tester is configured to obtain radio-frequency signal measurements while the first and second signal generators are providing the first and second radio-frequency signals to the adjustable antenna tuning element, and wherein the radio-frequency signal measurements obtained using the tester include intermodulation distortion measurements associated with the first radio-frequency signals at the first frequency and the second radio-frequency signals at the second frequency; and
a notch filter interposed between the tester and the broadband radio-frequency coupler, wherein the notch filter is configured to attenuate radio-frequency signals at the first frequency.
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Accused Products
Abstract
A wireless electronic device may contain at least one antenna tuning element for use in tuning the operating frequency range of the device. The antenna tuning element may include radio-frequency switches, continuously/semi-continuously adjustable components such as tunable resistors, inductors, and capacitors, and other load circuits that provide desired impedance characteristics. A test station may be used to measure the radio-frequency characteristics associated with the tuning element. The test station may provide adjustable temperature, power, and impedance control to help emulate a true application environment for the tuning element without having to place the tuning element within an actual device during testing. The test system may include at least one signal generator and a tester for measuring harmonic distortion values and may include at least two signal generators and a tester for measuring intermodulation distortion values. During testing, the antenna tuning element may be placed in a series or shunt configuration.
64 Citations
5 Claims
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1. A radio-frequency test system for testing an adjustable antenna tuning element, comprising:
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a first signal generator that is configured to provide first radio-frequency signals at only a first frequency to the adjustable antenna tuning element; a second signal generator configured to provide second radio-frequency signals at only a second frequency that is different than the first frequency to the adjustable antenna tuning element; and a first load pull tuner coupled to the adjustable antenna tuning element; a tester that is coupled to the adjustable antenna tuning element via a broadband radio-frequency coupler, wherein the tester is configured to obtain radio-frequency signal measurements while the first and second signal generators are providing the first and second radio-frequency signals to the adjustable antenna tuning element, and wherein the radio-frequency signal measurements obtained using the tester include intermodulation distortion measurements associated with the first radio-frequency signals at the first frequency and the second radio-frequency signals at the second frequency; and a notch filter interposed between the tester and the broadband radio-frequency coupler, wherein the notch filter is configured to attenuate radio-frequency signals at the first frequency. - View Dependent Claims (2, 3, 4, 5)
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Specification