Dimensions of a directional antenna of the "wave channel" type (Uda-Yagi) for the FM broadcast range 87.5-108 MHz.

An antenna for receiving FM signals over long distances can be made independently from a wooden block and aluminum tubes.
For calculations in the Mmana-Gal program, I chose an antenna with 5 elements, since I wanted to achieve a gain of 8 dbi.
(A 2-element loop antenna has the same 8 dbi gain, but it is very narrowband).

The length of the traverse is 2 meters. Dimensions 1.65 x 2 meters.
The 75 Ohm power cable is connected to the second element from the end (regular dipole).

The antenna has a moderate gain of 7.5-8 dbi, but very good matching with a 75 Ohm cable (SWR<1.5).

• Range 87.5-108 MHz
• Gain G=7.5 dbi
• F/B 10 db

Dimensions of a 5-element Uda-Yagi antenna, made of tubes with a diameter of 4 mm

Dimensions of a 5-element Uda-Yagi antenna, made of tubes with a diameter of 6 mm

Dimensions of a 5-element Uda-Yagi antenna, made of tubes with a diameter of 8 mm

Dimensions of a 5-element Uda-Yagi antenna, made of tubes with a diameter of 10 mm

Dimensions of a 5-element Uda-Yagi antenna, made of tubes with a diameter of 12 mm

Dimensions of a 5-element Uda-Yagi antenna, made of tubes with a diameter of 16 mm

SWR graph (matched to 75 Ohm cable)

Antenna radiation pattern (for frequency 99.5 MHz)

Antenna radiation pattern (for frequency 88.0 MHz)

Antenna radiation pattern (for frequency 107.0 MHz)

Archive of antenna models for the MMANA application

*yagi-fm.zip

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