uhf band
Design of Broadband Compact Canonical Tetra Sleeve Cage Antenna Covering UHF Band
... them. The proposed antenna has VSWR < 1.9 : 1 in frequency bands 270–330 MHz and 930–10 MHz. It has VSWR < 3 : 1 in frequency bands 250–410 MHz and 680–1850 MHz. The maximum value of VSWR in 250–1850 MHz is 3.3 : ...
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Modeling and Mitigation of the Effect of Free Space Optical Attenuation during Fog at UHF Band
... Figure 1: Measured signal attenuation against visibility at various frequencies within UHF band Figure 2 shows the variation of signal attenuation with distance at different frequencies in a clear weather. ...
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Investigation of error bounds of empirical path loss models at UHF band in Ondo State, Nigeria
... at UHF in Ondo State, Nigeria in a bid to establish which of them can best be used for geolocation data base approach of TVWS ...the UHF band along four major routes that spanned through the urban, ...
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A Circularly Polarized Compact Antenna for UHF Band RFID Reader
... To maintain the antenna performance with compact size, a novel antenna is designed using Yagi-Uda configuration. The impedance and AR bandwidth of the proposed antenna almost cover the entire UHF band, ...
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Temperature Effect on the Tropospheric Radio Signal Strength for UHF Band at Terengganu, Malaysia
... Based on RFI pattern, four sources of the radio signal namely 383 MHz, 945 MHz, 1800 MHz and 2160 MHz could be detected at KUSZA Observatory. Based on the statistical analysis of the correlation between RFI and ...
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Printed Compact Lens Antenna for UHF Band Applications
... A compact printed lens antenna for UHF band has been presented. From the measurements it has been verified that by the use of a lens, both the gain and front-to-back ratio have been improved. An improvement ...
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Planar fractal dipole antenna for the UHF band
... To design, simulate and fabricate a double sided planar dipole antenna based on the Koch curve fractal geometry and with truncated ground plane, that has operating frequency within the lower UHF band i.e. ...
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Analysis and experimental evaluation of the frequency response of an indoor radiating cable in the UHF band
... At the beginning of this paper, it was pointed out that radiating cables can be used as part of wireless systems such as in distribution systems, by providing coverage for in-building cellular scenarios, as well as in ...
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Design of Symmetric Bootlace Lens with Gain Analysis at UHF Band
... Gupta, “Rotman lens with equal height of array and feed contours,” IEEE Transactions on Antennas and Propagation, Vol. S., “Amplitude performance of Ruze and Rotman lenses,” Radio Electr[r] ...
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A Multi Band Holey Based EBG Resonator Antenna for Performance Enhancement in UHF Band Frequency Range
... ELECTROMAGNETIC band gap (EBG) structures have received tremendous amounts of attention in recent years [9]–[10]. The main advantages of these alternative structures include their ease and low cost of manufacture ...
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A Compact Antenna Design for UHF RFID Applications
... (UHF) band has received considerable attention for various commercial applications, such as automatic retail item management, warehouse management, access control system, electronic toll collection, ...the ...
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UHF Communication Studies in Urban Areas
... use. UHF channels are still used for digital television. UHF spectrum is used world-wide for land mobile radio systems for commercial, industrial, public safety, and military ...the UHF band, ...
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UHF diagnostic monitoring techniques for power transformers
... The UHF band covers 300 – 3000 ...this band depends on the risetime and falltime of the current pulse, the magnitude of the current and the signal-to-noise ratio of the measurement ...by UHF ...
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A Modified Omnidirectional Bi Conical Broad Band Antenna for VHF and UHF Range
... Ding et.al [15] 2010 A GA is used here to optimize a VHF/UHF antenna and its qualities also are mentioned here. The diameter it covers is 1.9 cm and the height covered is 1.79 m, which includes a 1.47-m loaded ...
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UHF and X Band Electro-Magnetic Shielding of Advanced Devices by Some Polymer–Composites
... The fine brass and copper turnings were cleaned and sieved, in order to select only those which pass through 1mm x 1mm area. The polymeric binder for the composites is a sealant, commercially available as a thick liquid ...
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Dual-Band UHF RFID Tag Antenna Using Two Eccentric Circular Rings
... A UHF dual-band RFID tag antenna, operating at 866 MHz and 956 MHz bands allocated for the use in Europe and Japan, respectively, is designed and ...MHz band and ...
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VHF / UHF Direct Connect Beams
... lowest band of ...each band. The 440 band shorting wire should be placed exactly 1 inch above the top of the horizontal pipe of the 440 tuning stub, the 220 band shorting wire should be placed ...
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VHF/UHF ALL MODE TRANSCEIVER i910H
... The filtered RF signals from the bandpass filter are mixed with a 1st LO signal at the 1st mixer circuit (Q220, Q221) to produce a 1st IF signal (71.25 MHz [Main] or 71.35 MHz [Sub]). The 1st IF signal is passed through ...
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A Sensing Platform For A UHF RFID System
... passive UHF RFID broadens up to 11 meters compared to 1-meter range of HF RFID, passive tags have been used for many applications such as tracking medical devices and objects of daily ...a UHF RFID system ...
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UHF DIPOLE ANTENNA AS-2810C/SRC
... 4-1. SITE INFORMATION. Valcom's AS-2810C/SRC UHF Antenna is designed primarily for shipboard installation. The antenna can also be used at shore installations. The antenna should be installed in a non-obstructed ...
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