Ahead of Print article · Journal article
Compact First-Order Probe for Spherical Near-Field Antenna Measurements at Low Frequencies
Guidelines for designing compact and lightweight first-order probes for spherical near-field antenna measurements at frequencies below 1 GHz that exploit first-order properties of electrically small self-resonant radiators combined into superdirective endfire arrays are established theoretically, exemplified numerically, and validated experimentally.
A prototype of the probe designed to operate at a central frequency of 435 MHz exhibits the impedance bandwidth of 15 MHz with a directivity of more than 9 dBi and parasitic $|\mu |\ne 1$ spherical modes suppressed to at least −42 dB. The probe height is just 343 mm above a 720-mm circular ground plane and weighs about 5 kg.
Language: | English |
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Publisher: | IEEE |
Year: | 2017 |
Pages: | 3684-3690 |
ISSN: | 15582221 and 0018926x |
Types: | Ahead of Print article and Journal article |
DOI: | 10.1109/TAP.2017.2700051 |
ORCIDs: | Kim, Oleksiy S. |
Antenna arrays Antenna measurements Bandwidth Dipole antennas Electrically small antennas Frequency bandwidth Frequency measurement Linear arrays Physical bounds Probes Quality factor Radiation Spherical near-field (SNF) Supergain antennas
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