The W8IO Antenna Site - Loggi - 144-35MAXFB

(updated 20 Jan 2016)

2 Meter Loggi - Optimized for F/B and F/R
This particular Loggi was created and optimized for high F/B and F/R at 144.1 MHz.  The plots are shown below. Here is the NEC2 file.

Loggi 144-35MAXFB Performance

Electrical Performance at 144.1 MHz0.250" Element Diameter
Directive Gain (dBi)16.34
Power Gain (dBi)16.26
E-Plane F/R (dB)48
H-Plane F/R (dB)37.03
E-Plane 1st Sidelobe (dB)-29.1
H-Plane 1st Sidelobe (dB)-24.1
E-Plane Beamwidth (deg)30
H-Plane Beamwidth (deg)32
Max VSWR (144-146 MHz)1.45
4 Bay G/T (dB) at TBD

Mechanical Performance:
Boom Length        31.85 feet        9.7 m        4.66 wavelength at 144.1 MHz
Recommended Feed Boom diameters: 1" to 1.25" square (DX Engineering or On-Line Metals)
Recommended element sources: On-Line Metals, McMaster-Carr

LP144-35-MAXFB current diagram


LP144-35-MAXFB Gain (dBi) and F/B and F/R

az plot
LP144-35-MAXFB azimuth pattern at 144.1 MHz

elevation plot
LP144-35-MAXFB elevation pattern at 144.1 MHz

Comments are welcome!

contact Roger: email to 

rgcox2 (at) gmail.com

Roger Cox W8IO - Spring Lake, MI