Accurate Measurement Techniques for 75 Ohms Antenna with 50 Ohms Vector Network Analyzer

Pumpoung, Tajchai

doi:10.15199/48.2020.06.07

Cited by 1 publication

(3 citation statements)

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“…Figure 16 a,b depicts the prototype of the portable wideband directional antenna scheme for digital terrestrial television reception without and with ABS radome. Experiments with the antenna prototype (75 Ω input impedance) were carried out in an anechoic chamber using a 50 Ω vector network analyzer (Agilent E5061B) [ 34 ]. The impedance transformer (TME ZT-205) was used to match a 75 Ω antenna with a 50 Ω measurement system.…”

Section: Prototype Fabrication and Measured Resultsmentioning

confidence: 99%

“…The power obtained was 38.4 dBµV (−70.4 dBm), with a carrier to noise ratio (C/N) of 11.6 dB. The signal spectrum was of a Rician fading channel, rendering the proposed antenna scheme suitable for outdoor digital terrestrial television reception [34]. Figure 21 shows the experimental setup for the outdoor and indoor testing of the proposed portable wideband directional antenna scheme with a digital video broadcasting (DVB) signal receiver (Promax Ranger Neo + ).…”

Section: Indoor and Outdoor Application Testingmentioning

confidence: 99%

“…The power obtained was 38.4 dBµV (−70.4 dBm), with a carrier to noise ratio (C/N) of 11.6 dB. The signal spectrum was of a Rician fading channel, rendering the proposed antenna scheme suitable for outdoor digital terrestrial television reception [34]. Figure 23 demonstrates the indoor reception performance of the proposed antenna scheme at 514 MHz.…”

Section: Indoor and Outdoor Application Testingmentioning

confidence: 99%

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Portable Wideband Directional Antenna Scheme with Semicircular Corrugated Reflector for Digital Television Reception

Luadang

Pukraksa

Janpangngern

et al. 2022

Sensors

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This research proposed a portable wideband horizontally-polarized directional antenna scheme with a radome for digital terrestrial television reception. The operating frequency band of the proposed antenna scheme is 470–890 MHz. The portable antenna scheme was an adaptation of the Yagi-Uda antenna, consisting of a folded bowtie radiator, a semicircular corrugated reflector, and a V-shaped director. Simulations were carried out, and an antenna prototype was fabricated. To validate, experiments were undertaken to assess the antenna performance, including the impedance bandwidth (|S11| ≤ −10 dB), gain, and unidirectionality. The measured impedance bandwidth was 75.93%, covering 424–943 MHz, with a measured antenna gain of 2.69–4.84 dBi. The radiation pattern was of unidirectionality for the entire operating frequency band. The measured xz- and yz-plane half-power beamwidths were 150°, 159°, 160° and 102°, 78°, 102° at 470, 680, and 890 MHz, with the corresponding cross-polarization below −20 dB and −40 dB. The radome had a negligible impact on the impedance bandwidth, gain, and radiation pattern. The power obtained for the outdoor test, at 514 MHz, was 38.4 dBµV (−70.4 dBm) with a carrier-to-noise ratio (C/N) of 11.6 dB. In addition, the power obtained for the indoor test was 26.6 dBµV (−82.2 dBm) with a C/N of 10.9 dB. The novelty of this research lies in the concurrent use of the Yagi-Uda and bowtie antenna technologies to improve the impedance bandwidth and directionality of the antenna for digital terrestrial television reception.

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Section: Prototype Fabrication and Measured Resultsmentioning

confidence: 99%

Section: Indoor and Outdoor Application Testingmentioning

confidence: 99%

“…The power obtained was 38.4 dBµV (−70.4 dBm), with a carrier to noise ratio (C/N) of 11.6 dB. The signal spectrum was of a Rician fading channel, rendering the proposed antenna scheme suitable for outdoor digital terrestrial television reception [34]. Figure 23 demonstrates the indoor reception performance of the proposed antenna scheme at 514 MHz.…”

Section: Indoor and Outdoor Application Testingmentioning

confidence: 99%

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