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Since 22.05.2006
Depuis le 22.05.2006
Dal 22.05.2006

Les antennes X-QUAD

2m and 70cm

The X-Quad is an improved development of the well-known multi-element quad. Its special characteristics developed for ham radio use are as followss:

polarization switchable (horizontal/vertical, circular right/circular left, diagonal) High gain compared to other antenna designs due to stacking effect short boom length and compact profi24.01.2008ement is a stacked quad- element showing comparable characteristics in the linear plane as compared to a cross-
slot aerial radiator. The advantage of the X-quad is that by choosing a different feed point it can be easily switched to the required polarization. Compared to the cross yagi all secondary elements of a X-quad (e.g. directors, reflectors) are active elements which contributes to the compact size of the X-Quad.

As with the cross yagis the polarization switching is done with a coaxial relais or one of our remote-control polarization switches directly at the antenna feed point. In this configuration only one feed cable is required whereas two feed cables are needed in case the switch is located at the transceiver. The antenna can be configured for fixed circular polarization by means of a phasing harness (see also the table). The secondary elements are located diagonally in relation to the driven elements which leads to the most favorable result. When mounting the antenna below the roof there will be little interference caused by stray fields compared to the performance of yagi antennas. Each and every single element is electrically connected to the boom and the shield of the coax cable. It nullifies interference caused by static discharge. Both feed lines are connected through N-type connectors and the connection box is water-sealed. Boom and elements are made of aluminium, all hardware is stainless steel. The antenna design and make is protected under German patent law (DBGM). The antennas are designed for fore-mast installation but the mast clamp can be mounted in the middle of the boom as well. In this case, a supporting mast made of fiberglass is required however.

 

 

 

 

 

 

 

Horizontal / Vertical

 

2m X-Quad

70cm X-Quad

No. of elements per polarization plane

12

18

Gain

10,5

12.8

dBD

3-dB beamwidth horizontal (E-plane)

47

36

Degrees

vertical (H-plane)

46

36

Degrees

front to back ratio (f/b)

19

21

dB

Power handling

1500

1000

Watt

Stacking distance

2.8

1.1

m

Length

1460

1270

mm

Height

730

220

mm

Weight

2.3

1.6

Kg

Wind Load at 160km/h

74

48

N

Connector

2xN-type connectors

vy 73's

(source internet)

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