front-to-back ratio


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front-to-back ratio

[¦frənt tə ¦bak ′rā·shō]
(electromagnetism)
Ratio of the effectiveness of a directional antenna, loudspeaker, or microphone toward the front and toward the rear.
(solid-state physics)
Ratio of resistance of a crystal to current flowing in the normal direction to current flowing in the opposite direction.
References in periodicals archive ?
RFS ultra-broadband (UBB) technology delivers higher performance gain for better coverage, reduced interference, and excellent front-to-back ratio and performance stability across frequencies.
The antennas boast superior radiation patterns due to their unique reflector design, providing a very small variation of the -3 dB horizontal beam width over the frequency band, as well as a high front-to-back ratio.
A 30 dB front-to-back ratio permits less physical separation on the tower thus adding mounting flexibility at installation sites where space is limited.
The sectors provide industry-leading front-to-back ratio performance with excellent cross pole discrimination in an uncommonly compact package (21.
Other features include low sidelobe performance, excellent front-to-back ratio, and high level co-located antenna-to-antenna isolation.
5:1 and outstanding front-to-back ratio performance.
The WiMax base station antenna's many features include low side lobe performance, excellent front-to-back ratio, and high-level co-located antenna-to-antenna isolation.
The hub planar antenna is an adaptation of California Amplifier's patented planar-array antenna, optimized to reduce side-lobes and increase front-to-back ratio.
5 GHz with 16 dBi gain and outstanding front-to-back ratio of more than 28 dB.
The high front-to-back ratio assures this array will focus the available power in the desired direction, producing the most reliable communications for all needs.
Its front-to-back ratio of over 28 dB ensures that the radiated energy is targeted towards the area of coverage, while a typical cross-polarization discrimination of over 20 dB ensures minimum interference from neighboring vertically polarized antennas.
The Optimizer Plus is a polarization diversity antenna that offers continuously adjustable electrical downtilt and a front-to-back ratio much higher than found in other polarization diversity antennas.