3,82 M 4el OWA 8,42 dBI

 

A 3,82M 4 elements OWA CB Yagi.

There are two versions on this page:

1- Metric

2- Inches

 

Above the azimuth plot. 8,42 dBI gain.

Above the freespace elevation plot.

Below the predicted SWR plot:

 

For:                    DX portion 11 meter band
Antenna Type:     4el OWA-YAGI
Designed by:       version 1.01 Nov 2005 (19DX348)
Boom length:      3,82 Meter
Gain:                  8,42 dBI (@27,555 Mhz)
Front to back:     <22 dB
Front to rear:      <22 dB
Impedance:         50 ohms, direct fed
SWR 1:1.1          > 350 Khz.
SWR 2:1             > 1700 Khz

 

 

Feeding the antenna:

The antenna is 50 Ohms and can be direct fed.

A 1:1 balun and/or a RF choke is a MUST for all Yagi’s.

 

All elements are made from:

3 meter long 22 mm tubes (center piece) inserted with 18mm (end tips) to complete the total lenght of the element.

 

Distances:

Reflector: Radiator  = 1,329 Meter

Reflector: Director 1 = 1,834 meter

Reflector: Director 2 = 3,82 Meter

 

Length:

Reflector = 2x 2,736 Meter (5,472 Meter)

Radiator = 2x 2,657 Meter  (5,314 Meter)

Director 1 = 2x 2,523 Meter  (5,046 Meter)

Director 2 = 2×2,4062 Meter  (4,813 Meter)

 

 4 elements OWA using INCH ELEMENT DIAMETER:

 

A home made 4el OWA using inches at : 91SD/OC075    (91SD750).

Thank you for sending the picture Itji !

 

Above the azimuth plot. 8,34 dBI gain.

 

 

Above the freespace elevation plot.

 

Above the predicted SWR plot:

 

 

For:                      DX portion 11 meter band
Antenna Type:       4el OWA-YAGI
Designed by:         version 1.01 Nov 2005 (19DX348)
Boom length:        3,82 Meter
Gain:                    8,32 dBI (@27,555 Mhz)
Front to back:       <22 dB
Front to rear:        <22 dB
Impedance:          50 ohms, direct fed
SWR 1:1.1           < 350 Khz.
SWR  2:1             < 1700 Khz

 

Feeding the antenna:

The antenna is 50 Ohms, the antenna can be direct fed.

A 1;1 balun and or a RF choke is always a MUST for all yagi’s

 

All elements are made from:

5/8 inch and 1/2 inch tubing.

The 5/8 inch tubing is 3 meters long the 1/2 inch tubing are inserted on both ends to complete the element length.

 

Distances:

Reflector: Radiator  = 1,450 Meter

Reflector: Director 1 = 1,920meter

Reflector: Director 2 = 3,82 Meter

 

Length:

Reflector = 2x 2,750 Meter (5,50 Meter)

Radiator = 2x 2,700Meter  (5,40 Meter)

Director 1 = 2x 2,560 Meter  (5,12 Meter)

Director 2 = 2×2,435 Meter  (4,87 Meter)



Comments are closed.