Antenna db gain vs distance
[DOC File]Template BR_Rec_2005.dot
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Hence in this study the interference criterion is taken to be −164 dB(W/(m2 · Hz)) to allow for the side-lobe gain of the RAS antenna of 15 dBi. 2.3 Interference mitigation techniques Each HAPS platform antenna contains a 12-section Chebyshev waveguide passband filter with a stop-band rejection ratio of better than 70 dB for unwanted ...
[DOC File]RADAR BASICS - UAH
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The unit of measure on the vertical axis is decibels, or dB, and is the common unit of measure for in radar applications. We define the beamwidth of an antenna as the distance between the 3-dB points of Figure 4. The 3-dB points are the angles where is 3 dB below its maximum value. As a side note, the maximum value of is the antenna gain, or .
[DOC File]IMT-Advanced Requirements - IEEE 802
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System gain - is defined as the difference, in dB, between transmitter power output at the base station and the receiver threshold (sensitivity) at the mobile terminal. System spectral efficiency – System spectral efficiency is defined as the ratio of the aggregate throughput (bits/sec) to all users in the system divided by the network wide ...
[DOC File]Aircraft interferer vs aircraft victim; separation distances
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Desired signal level at the receiver antenna (dBm) -93 -93 -93 -93 -93 -93 -93 -93 Receiver antenna gain (dB) 2 2 2 2 2 2 2 2 Receiver feeder loss (dB) 3 3 3 3 3 3 3 3 D/U in receiver passband (dB) 30 30 30 30 30 30 30 30 ... 102 90 85 80 78.75 75 70 65 Required Separation distance (m) 23714 5957 3308 1884 1611 1059 596 335 *Linear ...
[DOC File]Queueing Systems - 國立臺灣大學
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Unity gain antenna, 900 MHz carrier frequency SNR must be at least 25 dB for proper reception Receiver BW is B=30KHz, noise figure F=10 dB •What will be the maximum distance? •Solution: N= -174 dBm + 10 log 30000 + 10 dBM For SNR > 25 dB, we must have Pr > (-119+25) = …
[DOC File]Near Field Channel Model
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Far Field vs Near Field Links. The relationship between transmitted power (PTX) and received power (PRX) in a far-field RF link is given by "Friis’s Law:" (1) where GTX is the transmit antenna gain, GRX is the receive antenna gain, ( is the RF wavelength, k = 2 (/( is the wave number, and r is the range between the transmitter and receiver.
[DOC File]Template BR_Rec_2005.dot - ITU
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The array factor increases the transmitting antenna gain by 0.4 dB in equation (5). ... pfd bound vs. distance from nadir of HAPS platform. In the above calculation, a transmitting bandwidth of 11 MHz and a combined cable/feeder loss of 5 dB are assumed. The computed pfd is in the range of −84 dB(W/(m2 · MHz)) and −144.2 dB(W/(m2 · MHz ...
[DOC File]Antenna Pattern Measurement: Concepts and Techniques
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Usually, when one refers to the properties of an antenna, be it antenna pattern, gain, or another property, the reference is to the far-field, free-space properties of the antenna. In the far-field, free-space condition, the measured properties of the antenna do not appear to vary as a function of separation distance or antenna location.
[DOC File]Institute of Electrical and Electronics Engineers
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- Tx antenna gain = Rx antenna gain = 20 dBi. Figure 9.3.1. Co-channel interference level 9.4 624Mbps (Channel model) - Co-channel separation distance (dint) is about 11.2 m, from the following calculation. - Each parameter is referred to link budget. - Calculation is as follows. - Tx antenna gain = Rx antenna gain = 20 dBi. Figure 9.4.1.
ANALYSIS OF SHARING BETWEEN EARTH EXPLORATION …
IRIDIUM ANTENNA GAIN. The antenna gain of the IRIDIUM satellite towards the GLOBALSTAR satellite varies with the direction of the GLOBALSTAR satellite, the antenna panel considered and the beam considered on the panel. The distance between the GLOBALSTAR and IRIDIUM satellites varies from 630 to 7700 km.
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