Isolators and Circulators
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Waveguide
Isolators and Circulators
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A full range of waveguide junction circulators and isolators are available covering the frequency range 3.4GHz - 65.0GHz. This range includes units manufactured from investment castings and precision machined bodies to ensure optimum microwave performance.

Custom designs are available on request.


Waveguide Junction Circulators and Isolators - 3.4 to 26.5GHz
Waveguide Designation Frequency
(GHz) 		Type Number Specification Operating
Temperature
(°C) 		Dimensions
(mm) 		Mating
Flange
British
Standard 		IEC RETMA
Circulator
Isolator Isol'n
(dB) min 		Insert
Loss
(dB) max 		Ret'n
Loss
(dB) min 		a b c
WG11A R40 WR229 3.400 - 3.800 11C 3041 11F3041 28 0.2 28 0 to +50 120 79 58 UER 40
3.700 - 4.200 11C 3051 11F3051 28 0.2 28 0 to +50 120 79 58 UER 40
WG12 R48 WR187 4.400 - 5.000 12C 3051 12F3051 30 0.3 30 0 to +50 121 80 67 UER 48
WG14 R70 WR137 5.800 - 6.425 14C 3041 14F3041 28 0.1 28 0 to +50 82 51 40 UER 70
5.925 - 6.425 14C 3042 14F3042 28 0.1 28 0 to +50 82 51 40 UER 70
6.400 - 7.110 14C 3043 14F3043 28 0.15 28 0 to +50 82 51 40 UER 70
6.750 - 7.250 14C 3031 14F3031 28 0.15 28 0 to +50 82 51 40 UER 70
7.100 - 7.800 14C 3044 14F3044 28 0.15 28 0 to +50 82 51 40 UER 70
WG15 R84 WR112 7.000 - 7.500 15C 3031 15F3031 30 0.2 29 0 to +50 76 50 48 UBR 84
7.250 - 7.750 15C 3032 15F3032 30 0.2 29 0 to +50 76 50 48 UBR 84
7.250 - 7.750 15C 3033 15F3033 30 0.2 29 0 to +50 76 50 38 UER 84
7.700 - 8.400 15C 3041 15F3041 30 0.2 29 0 to +50 76 50 38 UER 84
7.900 - 8.500 15C 3034 15F3034 30 0.2 29 0 to +50 76 50 48 UBR 84
7.900 - 8.500 15C 3035 15F3035 30 0.2 29 0 to +50 76 50 38 UER 84
8.100 - 8.600 15C 3036 15F3036 30 0.2 29 0 to +50 76 50 48 UBR 84
8.100 – 8.600 15C 3037 15F3037 30 0.2 29 0 to +50 76 50 38 UER 84
WG16 R100 WR90 8.200 - 10.000 16C 3041 16F3041 20 0.3 21 0 to +50 61 41 41 UBR 100
8.500 - 9.600 16C 3042 16F3042 25 0.2 26 0 to +50 61 41 41 UBR 100
9.000 - 9.500 16C 3031 16F3031 25 0.2 26 0 to +50 61 41 41 UBR 100
9.300 - 9.500 16C 3021 16F3021 25 0.2 26 -20 to +50 61 41 41 UBR 100
9.500 - 11.000 16C 3051 16F3051 20 0.3 21 0 to +50 61 41 41 UBR 100
9.500 - 12.000 16C 3061 16F3061 20 0.3 19 0 to +50 61 41 41 UBR 100
10.000 - 10.500 16C 3032 16F3032 25 0.25 26 -40 to +85 61 41 41 UBR 100
10.700 - 11.700 16C 3043 16F3043 30 0.15 30 0 to +50 61 41 41 UBR 100
11.700 - 12.300 16C 3033 16F3033 30 0.3 30 0 to +50 61 41 41 UBR 100
11.700 - 12.500 16C 3034 16F3034 30 0.3 26 0 to +50 61 41 41 UBR 100
WG17 R120 WR75 10.700 - 11.700 17C 3041 17F3041 30 0.2 29 0 to +50 51 32 38 UBR 120
11.800 - 13.000 17C 3042 17F3042 25 0.3 23 -30 to +60 51 32 38 UBR 120
12.250 - 13.250 17C 3043 17F3043 27 0.2 26 0 to +50 51 32 38 UBR 120
WG18 R140 WR62 12.400 - 18.000 18C 3081 18F3081 20 0.5 19 0 to +50 50 28 35 UBR 140
12.500 - 13.250 18C 3031 18F3031 30 0.3 29 0 to +50 50 28 35 UBR 140
14.050 - 14.850 18C 3032 18F3032 28 0.3 26 -20 to +60 50 28 35 UBR 140
14.400 - 15.350 18C 3033 18F3033 28 0.3 26 -40 to +85 50 28 35 UBR 140
14.900 - 15.700 18C 3034 18F3034 28 0.3 26 -20 to +60 50 28 35 UBR 140
15.500 - 17.500 18C 3041 18F3041 20 0.4 19 -40 to +85 50 28 35 UBR 140
WG20 R220 WR42 17.700 - 19.700 20C 3041 20F3041 25 0.3 23 0 to +50 32 21 25 UBR 220
21.200 - 23.600 20C 3042 20F3042 25 0.3 23 0 to +50 32 21 25 UBR 220
24.200 - 26.500 20C 3043 20F3043 25 0.3 23 0 to +50 32 21 25 UBR 220
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Waveguide Junction Circulators and Isolators - 26.5 to 65.0GHz
Waveguide Designation Freq'y
(GHz) 		Band
Width
(MHz) 		Type Number Specification Operating
Temperature
(°C) 		Dimensions
(mm) 		Mating
Flange
British
Standard 		IEC RETMA
Circulator
Isolator Isol'n
(dB) min 		Insert
Loss
(dB) max 		Ret'n
Loss
(dB) min 		a b c
WG22 R320 WR28 26.500-40.000 100 22C3011 22F3011 30 0.5 26 0 to +50 25 16 20 UBR 320
250 22C3012 22F3012 27 0.5 26 -40 to +85 25 16 20 UBR 320
500 22C3013 22F3013 25 0.5 23 -40 to +85 25 16 20 UBR 320
1000 22C3021 22F3021 23 0.5 23 -40 to +85 25 16 20 UBR 320
2000 22C3031 22F3031 20 0.5 21 -40 to +85 25 16 20 UBR 320
WG25 R620 WR15 55.000-65.000 500 25C3011 25F3011 25 0.6 21 -30 to +85 25 19 25 UG 385/U
1000 25C3012 25F3012 20 0.6 19 -30 to +85 25 19 25 UG 385/U
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Registered Office:
MESL Microwave Limited, Lochend Industrial Estate, Newbridge, Edinburgh, EH28 8LP, Scotland
Tel: 0131 333 2000 | Fax: 0131 333 3607 | Registered in Scotland Number: SC074001