For: CB 11 AND 10 METERS
Antenna Type: 8 elements OWA-YAGI
Designed by: 19DX348 version 1.01 feb 2025 (NEC4 and NEC5)
Boom length: 17,95 Meter
Gain: 12,90 dBI (@27,600 MHz, Peak gain: 13,36 dBI @ 28,2 MHz)
FB <31 dB
FR <22 dB
Impedance: 50 ohms, direct fed
SWR 1:1 800 KHz.
SWR below 2:1 > 2000 KHz
A “straigth” element yagi with excellent antenna patterns over the entire bandwidht :
A true working horse with a HUGH SWR bandwidth and hugh power handling capabilities.
It will operate from 27,0 till 28,5 MHz with a low SWR.
Above the single ELEVATION plot in freespace @27,600 MHz.
Above, the SWR plot. 50 Ohms over a very wide frequency.
Above the freespace ELEVATION AND AZIMUTH plot @ 27,4 MHz.
Above the freespace ELEVATION and AZIMUTH plot @ 27,600 MHz
Above the freespace ELEVATION AND AZIMUTH plot @ 27,800 MHz
Above the freespace ELEVATION AND AZIMUTH plot @ 28 MHz
Above the freespace ELEVATION AND AZIMUTH plot @ 28,200 MHz
Above the freespace ELEVATION AND AZIMUTH plot @ 28,400 MHz.
Above the Gain / Front to back / Front to rear frequency response.
Elements:
All elements are made out ‘STANDARD PKW ELEMENTS”
The center piece is 2 meters long and has a 30mm diameter.
All element tips are 20mm in diameter.
Do not change element diameters lengths or positions, if you need other dimension feel free to ask.
Distance: Element Length:
0,000 m Reflector 5,62 m
1,250 m Radiator 5,444 m
1,910 m Director 1 5,134 m
3,985 m Director 2 5,022 m
6,9680 m Director 3 4,925 m
10,563 m Director 4 4,848 M
14,410 m Director 5 4,754 M
17,950 m Director 6 4,716 M
FEEDING THE ANTENNA :
The antenna is 50 Ohms, the radiator can be split in half and be fed directly. (a RF Choke or 1:1 balun is always adviced for “all” antennas.)
Not for commercial use.