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LOG5FM 5-element log-periodic antenna

 0,00 109,99

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 109,99

In stock

 4,99 56,99

In stock

 0,00 749,99
 4,99

In stock

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Description

5-element log-periodic antenna for low to medium power FM transmitters

Precise manufacturing, attractive price and no-tune operation make this directional log-periodic antenna (radiates most of the signal in one direction) a good match for LPFM to 100W max transmitters. It is recommended if you want to cover a specific direction, only 100W max power will be used and wide-band operation without tuning is a plus. Due to high gain it also greatly enhances signal reception, if used in a receiver so it is an excellent choice for measuring receivers. Several antennas can be combined to create very directional very high-gain antenna setup.

Technical specifications:
– No. of elements: 5
– Gain: 6,5 dBd
– Front/back ratio: 15 dB
– Beam width -3dB: H 140° / V 60°
– Vswr/ROE: 1:1.5 max (about 1:2.0 when used in 50 ohm systems)
– Power handling: 100W max (recommend connector change to N with extension coaxial cable)
– Wind resistance @120km/h (720N7m2): 27,5
– Impedance: 75 ohm (usable at 50 ohm with small increase of SWR)
– Antena dimensions: 1720 mm x 1220 mm x 50mm
– Freq. range: 87.5-108 MHz (no tune)
– Connector: coaxial cable is wired directly to the balun
– Weight: 1.3Kg
– Full mounting material is included!

 

How much ERP will my transmitter have with one LOG5FM antenna in ideal situation?
100W transmitter: Your ERP will be increased 6dBd (4x), 100W transmitter will have 400W ERP*, this usually doubles your effective range.
(*) not taking coaxial cable losses into account so slightly less. ERP means the power equivalent required to produce identical signal with a dipole antenna which has a gain of 0dBd.

How much ERP will my transmitter have with two LOG5FM antennas in 2-bay configuration?
100W transmitter: Your ERP will be increased 9dBd (4×2=8), 100W transmitter will have 800W ERP*
9dBd gain usually results in more than doubled range, note the beam will narrow as well and directivity will increase
(*) not taking coaxial cable losses into account so slightly less. ERP means the power equivalent required to produce identical signal with a dipole antenna which has a gain of 0dBd.

How much ERP will my transmitter have with four LOG5FM antennas in 4-bay configuration?
100W transmitter: Your ERP will be increased 12dBd (4×4=16), 100W transmitter will have 1600W ERP*
12dBd gain usually results in quadrupled range, note the beam will narrow as well and directivity will increase
(*) not taking coaxial cable losses into account so slightly less. ERP means the power equivalent required to produce identical signal with a dipole antenna which has a gain of 0dBd.

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