Antennas for FM Radio 87-108 MHz

June

2024

антенны, FM

14 June 2024 15:16

I begin the publication of the drawings of the antennas v. Today these are several antennas for receiving FM radio 87-108 MHz.

The following types of dipole antennas have an input impedance of 75 ohms.

АNTENNA 1. Dipol 87-101 MHz

element	A
Position, MM	0
length, mm	1500

A tube with a diameter of 10 mm.

Active element A is a split dipole fed from a coaxial cable with a wave impedance of 75 Ohm.

CSV schedule:

АNTENNA 2. Dipol 97-108 MHz

element	A
Position, MM	0
length, mm	1356

A tube with a diameter of 10 mm.

Active element A is a dipole fed by a coaxial cable with a wave impedance of 75 Ohm.

SWR graph:
FM104SWR

АNTENNA 3. Wide-band Dipol Open Sleeve at 87-108 MHz

element	A	D1
Position, MM	0	100
length, MM	1600	1244

A tube with a diameter of 10 mm.

L'élément actif A est un dipôle alimenté par un câble coaxial d'une impédance d'onde de 75 ohms.
L'association de l'élément actif avec l'élément D1, plus court, donne naissance à l'OWA (antenne large bande optimisée).

SWR graph:

Archive of models for the Mmana or Mmana-Gal Basic program:
FM123.zip

Antenna 4: an elongated GP wire 1m with a capacitor (95 MHz)

Two counterweights of 755 mm in line, the vertical part is 1070 mm.
The capacitor at the power point at the central core to the canvas - 7 ... 8 PF from the cable.

SWR graph: