Automated Broadband High-Dynamic-Range Nonlinear Distortion Measurement System

Wilkerson, Jonathan R.; Gard, K.G.; Steer, M.B.

doi:10.1109/tmtt.2010.2045525

Cited by 31 publications

(21 citation statements)

References 14 publications

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“…The heat generated in the volume of the incremental lossy element, (units of ) is equivalent to the element's power dissipation (21) where is the cuurrent density vector in unit of . The electric field in the conductor due to the current density is (22) Here is the ambient temperature and is the periodic temperature due to sinusoidal heating. Further terms in the series have been dropped due to the magnitude difference between and in most metals.…”

Section: B Electro-thermal Pim Of a Finite Element On The Patchmentioning

confidence: 99%

“…The third-order PIM is then determined by expanding (22). The electric fields of the upper and lower intermodulation products (intermods) generated by each finite element are…”

Section: B Electro-thermal Pim Of a Finite Element On The Patchmentioning

confidence: 99%

“…Transmission PIM measurement used the two-port PIM measurement system described in [22] with the DUT replaced by the subject antenna connected to Port 1 and an identical patch antenna at Port 2. The antennas were in an anechoic chamber with low PIM helical cables connecting the antennas to the external PIM test system.…”

Section: Antenna Measurementmentioning

confidence: 99%

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Passive Intermodulation Distortion in Antennas

Wilkerson

Kilgore

Gard

et al. 2015

IEEE Trans. Antennas Propagat.

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An analytic formulation of passive intermodulation distortion (PIM) in antennas is presented for PIM introduced by electro-thermal modulation of conductivity by current-related losses. A silver rectangular patch antenna was fabricated using a sapphire substrate isolating the thermal process from other possible sources. Two-tone testing at 990 MHz using a sweep of the tone separation from 3 Hz to 100 kHz is reported. Both transmitted and reflected PIM are characterized using a high dynamic range two-tone test system incorporating an analog canceler achieving a dynamic range of 125 dB at 1-Hz tone separation for reflection measurements, and 100 dB at 10-Hz tone separation for transmission measurements with each tone set to 32.3 dBm.

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Section: B Electro-thermal Pim Of a Finite Element On The Patchmentioning

confidence: 99%

“…The third-order PIM is then determined by expanding (22). The electric fields of the upper and lower intermodulation products (intermods) generated by each finite element are…”

Section: B Electro-thermal Pim Of a Finite Element On The Patchmentioning

confidence: 99%

See 1 more Smart Citation

Passive Intermodulation Distortion in Antennas

Wilkerson

Kilgore

Gard

et al. 2015

IEEE Trans. Antennas Propagat.

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“…where is the radius of gyration, is the speed of sound in the element, is its length, and is the th solution to (5) Table I lists the first three transverse vibrational modes of each element. Fig.…”

Section: Vibration Measurementmentioning

confidence: 99%

Standoff Acoustic Modulation of Radio Frequency Signals in a Log-Periodic Dipole Array Antenna

Wetherington

Steer

2012

Antennas Wirel. Propag. Lett.

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“…Feedforward cancellation is a well-known technique for signal and noise suppression and active cancellers have been widely applied as reverse power cancellers (RPCs) for continuous-wave (CW) radar [3]- [6], for co-channel and adjacent channel distortion measurement [7]- [10], and for PIM measurement [11], [12]. These cancellers typically employ a combination of amplitude and phase shifters or a vector modulator which require manual or slow iterative tuning for optimal cancellation.…”

Section: Introductionmentioning

confidence: 99%

Robust Analog Canceller for High-Dynamic-Range Radio Frequency Measurement

Wetherington

Steer

2012

IEEE Trans. Microwave Theory Techn.

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An automated analog canceller is presented that uses feedforward cancellation in a bridge configuration. A minimum of 70 dB of analog cancellation is obtained. The canceller is used to construct an intermodulation distortion measurement system achieving up to 120 dBc of intermodulation dynamic range in twoport transmission testing and 140 dBc of intermodulation dynamic range in one-port reflection testing for frequency separations of at least 1 kHz. At a two-tone frequency separation of 1 Hz, the respective dynamic ranges are at least 94 and 111 dBc. The relationship of cancellation performance and dynamic range is examined in terms of application-specific definitions of dynamic range. The system is then used to measure passive intermodulation distortion using a two-tone test with a tone frequency separation from 1 Hz to 100 MHz.Index Terms-Broadband, cancellation system, dynamic range, nonlinear measurement, passive intermodulation distortion (PIM), reverse power canceller, reverse power cancellers (RPC).

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Automated Broadband High-Dynamic-Range Nonlinear Distortion Measurement System

Cited by 31 publications

References 14 publications

Passive Intermodulation Distortion in Antennas

Passive Intermodulation Distortion in Antennas

Standoff Acoustic Modulation of Radio Frequency Signals in a Log-Periodic Dipole Array Antenna

Robust Analog Canceller for High-Dynamic-Range Radio Frequency Measurement

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