Measurement and explanation of DC/RF power loci of an active patch antenna

Neil J. McEwan; Nazar T. Ali; Kahtan Mezher; Elmahdi A. El-Khazmi; Raed A. Abd-Alhameed

doi:10.4218/etrij.11.0110.0144

Measurement and explanation of DC/RF power loci of an active patch antenna

Neil J. McEwan, Nazar T. Ali, Kahtan Mezher, Elmahdi A. El-Khazmi, Raed A. Abd-Alhameed

Electrical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

A case study of an active transmitting patch antenna revealed a characteristic loop locus of DC power versus RF output power as drive frequency was varied, with an operational bandwidth substantially smaller than the impedance bandwidth of the radiator. An approximate simulation technique, based on separation of the output capacitance of the power transistor, yielded easily visualized plots of power dependence on internal load impedance, and a simple interpretation of the experimental results in terms of a near-resonance condition between the output capacitance and output packaging inductance.

Original language	British English
Pages (from-to)	6-12
Number of pages	7
Journal	ETRI Journal
Volume	33
Issue number	1
DOIs	https://doi.org/10.4218/etrij.11.0110.0144
State	Published - Feb 2011

Keywords

Active antenna
DC/RF power loci
Patch antenna
Power added efficiency
Power amplifiers
RF transistor modeling

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10.4218/etrij.11.0110.0144

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abstract = "A case study of an active transmitting patch antenna revealed a characteristic loop locus of DC power versus RF output power as drive frequency was varied, with an operational bandwidth substantially smaller than the impedance bandwidth of the radiator. An approximate simulation technique, based on separation of the output capacitance of the power transistor, yielded easily visualized plots of power dependence on internal load impedance, and a simple interpretation of the experimental results in terms of a near-resonance condition between the output capacitance and output packaging inductance.",

keywords = "Active antenna, DC/RF power loci, Patch antenna, Power added efficiency, Power amplifiers, RF transistor modeling",

author = "McEwan, {Neil J.} and Ali, {Nazar T.} and Kahtan Mezher and El-Khazmi, {Elmahdi A.} and Abd-Alhameed, {Raed A.}",

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AU - El-Khazmi, Elmahdi A.

AU - Abd-Alhameed, Raed A.

PY - 2011/2

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AB - A case study of an active transmitting patch antenna revealed a characteristic loop locus of DC power versus RF output power as drive frequency was varied, with an operational bandwidth substantially smaller than the impedance bandwidth of the radiator. An approximate simulation technique, based on separation of the output capacitance of the power transistor, yielded easily visualized plots of power dependence on internal load impedance, and a simple interpretation of the experimental results in terms of a near-resonance condition between the output capacitance and output packaging inductance.

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KW - DC/RF power loci

KW - Patch antenna

KW - Power added efficiency

KW - Power amplifiers

KW - RF transistor modeling

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Measurement and explanation of DC/RF power loci of an active patch antenna

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