Build a lowcost yagi antenna for PMR446
PMR446 stands for Personal Mobile Radio and is a license free radio in the 446 MHz UHF band. That is about 6 Mhz above the 70cm amateur radio band
post 21 May 2023
Antenna for UHF VHF Links →
8x2 Element Array Antenna For 144 MHz
Front/back ratio was measured with a Drake R4c receiver with VHF converter listening to some strong and weak signals. I found substantially more than 25 dB
144MHz 2m Portable Yagi VHF Beam Antenna
6 elements was chosen, as the boom length is 2m (6.5ft) which keeps it portable, whilst still having good gain
144 MHz 25 Ohm Stacked Yagi
The array works excellent with a very good antenna pattern.The measured SWR of the complete group in the common feeding point is 1,1 beween 144,0 and 144,8 MHz
9 element yagi for 144Mhz
>Band 144-146 MHz, gain 11 dB
A Batwing Antenna
A batwing element with dimensions for a center frequency of 434.5 MHz which should cover 370 to 500 MHz with a VSWR of 1:1.1 or less. All dimensions shown are in inches. Multiply by 2.54 to obtain dimensions centimeters
155
Front/back ratio was measured with a Drake R4c receiver with VHF converter listening to some strong and weak signals. I found substantially more than 25 dB
6 elements was chosen, as the boom length is 2m (6.5ft) which keeps it portable, whilst still having good gain
The array works excellent with a very good antenna pattern.The measured SWR of the complete group in the common feeding point is 1,1 beween 144,0 and 144,8 MHz
>Band 144-146 MHz, gain 11 dB
A batwing element with dimensions for a center frequency of 434.5 MHz which should cover 370 to 500 MHz with a VSWR of 1:1.1 or less. All dimensions shown are in inches. Multiply by 2.54 to obtain dimensions centimeters
Antennas_manufacturers
About Rtty mode
Audio Recording
Amplifiers
Antennas Satellite
Amateur Television ATV
Aprs software
Beacon
Band Plan Ham Radio
Capitals Europe
DX cluster software
Italy provices
Italia-call-ham radio Italy provices Ham Radio Clubs Italy
EME Ham Radio Satellite
Grid Software
Ham shirts
Ham radio Magazine
Log Converter Software
Logs Search Services
Meteor scatter
Microwave
Mac Ham Radio Software
Practice with the soldering
Propagation Solar Cycle
Power Supply
PMR 466Mhz
Packet Radio TNC
PSK31 software
Prefix World
Propagation prediction
Qrp low power
QSL Printing
QRSS Amateur VLF operating
Radio old Museum
Radio portal
Surplus radio
Sstv Photo
SWL Shortwave DX Radio
Telegraph Morse code
VHF Activit
Web SDR