15 GHz
Very Long Baseline Polarimetric monitoring at 15 GHz of the TeV blazar Markarian 421
... This dataset for Mrk 421 was produced with VLBA, with one observation per month during the entire 2011, at three frequencies: 15, 24 and 43 GHz. Observations were car- ried out both in total and polarized ...
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On Chip Inductor Technique for Improving LNA Performance Operating at 15 GHz
... This paper presents a technique for low noise figure reduction of low-noise amplifier (LNA). The proposed LNA is de- signed in a source degeneration technique that offers lower noise figure. The resistance of the on-chip ...
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Analysis of Outdoor and Indoor Propagation at 15 GHz and Millimeter Wave Frequencies in Microcellular Environment
... The Fifth Generation (5G) of the mobile communication system based on Time Division Duplex (TDD) operating at 15 GHz frequency is considered at reference [9]. The 5G communication system consists of four ...
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Triple Band Notched UWB Antenna Design Using Electromagnetic Band Gap Structures
... (3.3 GHz–3.8 GHz), wireless local area network WLAN band ...(5.15 GHz–5.825 GHz) and X-band downlink satellite communication band ...(7.1 GHz– ...
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Dual Trident UWB Planar Antenna with Band Notch for WLAN
... In recent era, ultra-wideband (UWB) communication system and its application to high speed data transfer and video streaming are becoming popular. The UWB band is from 3.1 GHz to 10.6 GHz and was assigned ...
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An Exceptional Radio Flare in Markarian 421
... delay of about 40 days from the gamma-ray flare to the radio flare. Preliminary analysis of the 15 GHz radio light curve and our VLBA follow-up observations does not find evidence for the ejection of a ...
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A Compact Dual-Band Patch Antenna for WLAN Applications
... The structure of the proposed antenna is shown in Fig. 1, and the optimized lengths of some parameters are shown in Table 1. This CPW-fed antenna is printed on a 20 mm × 25 mm substrate with relative permittivity of 2.65 ...
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Development of a new approach for high-quality quadrupling frequency optical millimeter-wave signal generation without optical filter
... 60 GHz millimeter-wave can be generated from a 15 GHz RF oscillator with an OSSR as high as 40 dB and an RFSSR exceeding 35 dB without any optical or electrical filter when the extinction ratio of ...
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A Broadband 3D Printed Fractal Tree Monopole Antenna
... 1 GHz to 20 ...1.3 GHz, 10 GHz, 15 GHz, and 20 ...1.3 GHz is better than 68 dB below the co-polarized ...10 GHz is 26 dB. This degrades to 24 dB at 15 GHz, ...
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Comparative Studies of the Rain Attenuation Predictions for Tropical Regions
... the 15 GHz link, it has been observed that the ITU-R model closely agrees with the measured value at ...38 GHz, which suggest that it may not be suitable for predicting rain attenuation at higher ...
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An extended mode-matching model for improved relative permittivity measurements using a split-cylinder resonator
... Figure 3 shows the measured spectrum for a BF33 substrate material in the frequency range 5–15 GHz with the resonant modes predicted by the model in this range. 44 GHz) can be explained [r] ...
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Compact F-shaped Mobile Antenna for Multiple Wireless Applications
... 1.575 GHz (Global Positioning System), 2.1 GHz (3G), 2.3 GHz (Universal Mobile Telecommunications System) and ...2.9 GHz (Digital Multimedia ...
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5G Communications Multiband Antenna Design
... Abstract —. In this paper, a novel reconfigurable antenna with multiband of frequency is analysed and simulated for the modern 5G mobile communication applications. The proposed antenna is simulated by applying ADS ...
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Broadband Stacked U-Slot Microstrip Patch Antenna
... 3. CALCULATIONS AND DISCUSSION OF RESULTS The calculations for return loss of the antenna were carried out using Equation (13); the resulting data are shown in Figure 4. It depicts the antenna has two resonance ...
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CPW-Fed UWB Compact Antenna for Multiband Applications
... With the increase in demand of wireless communication systems, personal communication devices are required to operate at multiple frequencies to cater to different applications. In addition to multiband operation, it is ...
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Evaluation and Measurement of the Doppler Spectrum in a Reverberation Chamber
... Assume that it takes the stirrers 2 sec to go through the entire 1000 stirrer positions; the Doppler spectrum can be calculated using the previous estimator (4) and the improved estimator (15). Before applying ...
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Octagonal Fractal Antenna for 5 GHz Band: Modelling and Evaluations
... We propose, construct and test an Octagon shaped fractal antenna. This fractal antenna consist of simple iterative geometry. As per our expectation the designed geometry represents computability in wide range of ...
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First results from the microwave air yield beam experiment (MAYBE): Measurement of GHz radiation for ultra-high energy cosmic ray detection
... The measurement of the power spectrum for MAYBE is done using both the R&S spectrum analyzer directly taking data from 1 to 7 GHz. Pulse-to-pulse time jitter in the Van de Graaff made it impossible to use the ...
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Effects of Defected Waveguide Structure Toward Wideband Monopole Antennas
... 8.5 GHz and high efficiency of more than − 2 ...6 GHz to 11 GHz but a significant directivity improvement of 5 dBi at a lower frequency ...8.5 GHz. Higher gain was improved at around 4 dB at ...
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Design Analysis of a Hexaband Slot Loaded Microstrip Patch Antenna using ANN
... Agata et al. suggested a novel printed bow-tie antennas for dual-band dual-mode mobile handset applications. They introduced this antenna for dual-band GSM/DCS 1800 operation on a single handset employing dual-band ...
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