Tech Support - Antennas
GPS antennas: Key Physical and Electrical Characteristics
What is a GPS antenna?
A
GPS antenna
is a radio frequency antenna that provides
connectivity with the
Global Positioning
System
, a proprietary, satellite-based radio navigation system
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Posted by George Hardesty on 25th Jul 2020
Spatial Diversity Overcomes Multi-Path Interference | Wireless Links Over Water
Spatial diversity is a useful feature for overcoming multi-path interference. By providing spatial diversity, the radio's internal circuitry can select between the two receive antennas for better w
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Posted by George Hardesty on 25th Jul 2020
Antenna Radiation Patterns: H-Plane, E-Plane, XY XZ YZ Planes
This article explains
radiation patterns, detailing how polarization (linear and vertical) relates to the E-Plane and H-Plane, and how XY, XZ and YZ planes correspond to E-Plane and H-Plane.
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Posted by George Hardesty on 19th Apr 2020
Maximum Input Power Rating of Antennas
Maximum Input Power is defined as: The maximum amount of power (voltage given in Watts) that is able to be transmitted to a single antenna without damage to the antenna port from overloading.
Max
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Posted by George Hardesty on 6th Nov 2019
FPV (First Person View) Antennas for Drones
FPV (First Person View), are remotely controlled vehicles from a pilot’s or drivers point of view. They include unmanned aerial vehicles such as drones and ground vehicles such as RC cars and land
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Posted by George Hardesty on 11th Oct 2019
Antenna Polarization: Vertical, Linear: Key Factor in Selection of an Antenna
Polarity is a key electrical characteristic to be considered when selecting an antenna. Like-matched antennas in an RF set-up will have optimal power or signal transfer in point-to-point appli
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Posted by George Hardesty on 11th Oct 2019
45-degree Slant Antenna Polarization Overcomes Interference and Issue w/ Dual-Polarization
Signals received at base station
antennas are typically elliptically polarized in a way more like vertical polarization than horizontal polarization. This creates a common problem with dual pola
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Posted by George Hardesty on 19th May 2019
VSWR: Impedance Matching in Antennas & Antenna Cables
Voltage Standing Wave Ratio (V.S.W.R.) is a key Indicator of antenna performance (along with gain/dBi): The lower the VSWR, the more efficient the antenna.
VSWR is a measure of the effic
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Posted by George Hardesty on 18th May 2019
dBi, dB, dBm dB(mW): Defined, Explained and Differentiated
dBi = dB(isotropic): The forward gain of an antenna, measured in decibels (dBi), The dBi value reflects the antenna's directional / beamwidth characteristics, i.e., directional as opposed to omni
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Posted by George Hardesty on 27th Apr 2019
Operate 2 Antennas from One Radio: Use a "Power Divider" or "Antenna Combiner" - NOT a T-adapter
Do not use a "T connection" to get one AP to service two
antennas: This causes many problems, further described below. By "T connection," we mean T-adapter to combine two antennas onto the same a
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Posted by George Hardesty on 26th Apr 2019
If Antenna frequency band exceeds needed range: Use Filter on system board to reduce excess band
Example: You need only 860-960 MHz
GSM band but the antenna covers
800-960MHz: One customer told us that using an antenna that includes 824-960 band allows too much interference, that co
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Posted by George Hardesty on 12th Apr 2019
dBm to Watt Conversion Table
Upgrading your antenna, even just a small increment in dBm, makes a HUGE impact on the range of your device:
dBm
0
1
2
3
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Posted by George Hardesty on 31st Mar 2019
