| MICROWAVE RADIO COUPLERS |
These couplers are primarily designed for use in microwave radios but can be applied to other applications with bandwidths up to 20%
|
FREQUENCY OF RADIO
|
WAVEGUIDE SIZE |
COUPLING VALUE (NOMINAL MID-BAND) |
DIMENSIONS TYPICAL (mm) |
|
GHz
|
U.K.
|
I.E.C.
|
E.I.A.
|
3dB
|
6dB
|
10dB
|
L
|
H
|
W
|
|
7
|
WG14
|
R70
|
WR13
|
14-R-8807-3
|
14-R-8807-6
|
14-R-8807-10
|
200
|
75
|
70
|
|
13
|
WG17
|
R120
|
WR75
|
17-R-8813-3
|
17-R-8813-6
|
17-R-8813-10
|
125
|
40
|
38
|
|
15
|
WG18
|
R140
|
WR62
|
18-R-8815-3
|
18-R-8815-6
|
18-R-8815-10
|
125
|
40
|
34
|
|
18
|
WG20
|
R220
|
WR42
|
20-R-8818-3
|
20-R-8818-6
|
20-R-8818-10
|
75
|
40
|
24
|
|
23
|
WG20
|
R220
|
WR42
|
20-R-8823-3
|
20-R-8823-6
|
10-R-8823-10
|
75
|
40
|
24
|
|
26
|
WG20
|
R220
|
WR42
|
20-R-8826-3
|
20-R-8826-6
|
20-R-8826-10
|
75
|
40
|
24
|
|
38
|
WG22
|
R320
|
WR28
|
22-R-8838-3
|
22-R-8838-6
|
22-R-8838-10
|
75
|
40
|
24
|
| Standard Specifications: | |
| Coupling value | 3, 6 or 10 dB nominal (See table) |
| Tolerance on Nominal Value | ± 1.0dB over band |
| Flatness | ± 1.0dB over band |
| Directivity | 20 dB min |
| V.S.W.R | 1.10: max. Main Line |
| 1.20: Secondary Line (WG output) | |
| Customer to specify: | |
| Flange type | Certain types may indicate changes in overall width |
| Material | Brass or Aluminium |
| Finish | External: Semi gloss white paint standard |
| Power handling | The standard range illustrated are narrow band, low power designs. |
| Most sizes have a higher performance option available - Consult factory for details |
* there is an important trade off between performance and cost. Please specify your requirements in detail to obtain an optimum solution. Many high performance models are available and the physical size can also be altered to suit your requirements.