Rotary Switches
Waveguide Rotary Switches
Standard Designs
Waveguide
Size
|
Freq'y
Range
(GHz)
|
Isolation
min
(dB)
|
Insertion
Loss
max
(dB)
|
VSWR
Max
|
Power Rating
|
Voltage Operated Electrical
|
|
Peak
|
Average
|
Nominal Current
@25°C
|
Switching time ms
|
|
UK
|
153 IEC
RETMA
|
typ
|
max
|
|
WG8
|
R22
WR430
|
1.7-2.6
|
100
|
0.01
|
1.04:1
|
6MW
|
8kW
|
3A
|
260
|
400
|
|
WG10
|
R32
WR284
|
2.6-3.95
|
100
|
0.01
|
1.04:1
|
3MW
|
4kW
|
3A
|
260
|
400
|
|
WG11a
|
R40
WR229
|
3.3-4.9
|
100
|
0.01
|
1.04:1
|
2MW
|
4kW
|
3A
|
160
|
200
|
|
WG12
|
R48
WR187
|
3.95-5.85
|
100
|
0.01
|
1.04:1
|
1MW
|
4kW
|
3A
|
150
|
200
|
|
WG14
|
R70
WR137
|
5.85-8.2
|
100
|
0.01
|
1.04:1
|
500kW
|
4kW
|
2A
|
100
|
150
|
|
WG15
|
R84
WR112
|
7.05-10.0
|
100
|
0.01
|
1.04:1
|
350kW
|
4kW
|
2A
|
100
|
150
|
|
WG16
|
R100
WR90
|
8.2-12.4
|
100
|
0.01
|
1.05:1
|
300kW
|
3kW
|
2A
|
53
|
100
|
|
WG17
|
R120
WR75
|
10.0-15.0
|
100
|
0.01
|
1.05:1
|
300kW
|
3.5kW
|
2A
|
60
|
100
|
|
WG18
|
R140
WR62
|
12.4-18.0
|
100
|
0.01
|
1.05:1
|
125kW
|
3kW
|
2A
|
50
|
100
|
|
WG20
|
R220
WR42
|
18.0-26.5
|
85
|
0.02
|
1.05:1
|
50kW
|
0.8kW
|
2A
|
45
|
75
|
|
WG22
|
R320
WR28
|
26.5-40.0
|
85
|
0.03
|
1.06:1
|
25kW
|
0.4kW
|
2A
|
45
|
75
|
|
WG23
|
R400
WR22
|
33.0-50.0
|
60
|
0.05
|
1.1:1
|
15kW
|
0.2kW
|
2A
|
45
|
75
|
|
WG26
|
R740
WR12
|
60.0-90.0
|
85
|
0.02
|
1.1:1
|
15kW
|
0.2kW
|
2A
|
45
|
75
|
Light Weight Designs
Waveguide
Size
|
Freq'y
Range
(GHz)
|
Isolation
min
(dB)
|
Insertion
Loss
max
(dB)
|
VSWR
Max
|
Power Rating
|
Voltage Operated Electrical
(DC Voltage = 28V±10%)
|
|
Peak
|
Average
|
Nominal Current
@25°C
|
Switching time ms
|
|
UK
|
153 IEC
RETMA
|
typ
|
max
|
|
WG14
|
R70
WR137
|
5.85-8.2
|
90
|
0.02
|
1.04:1
|
500kW
|
4kW
|
4A
|
60
|
100
|
|
WG15
|
R84
WR112
|
7.05-10.0
|
85
|
0.02
|
1.04:1
|
350kW
|
4kW
|
2A
|
100
|
150
|
|
WG16
|
R100
WR90
|
8.2-12.4
|
80
|
0.03
|
1.05:1
|
300kW
|
3kW
|
1A
2A
|
95
65
|
130
90
|
|
WG17
|
R120
WR75
|
10.0-15.0
|
85
|
0.03
|
1.05:1
|
300kW
|
3kW
|
1A
2A
|
95
65
|
130
90
|
|
WG18
|
R140
WR62
|
12.4-18.0
|
85
|
0.03
|
1.06:1
|
125kW
|
2kW
|
1A
2A
|
55
35
|
100
60
|
|
WG25
|
R620
WR15
|
50.0-75.0
|
80
|
0.15
|
1.1:1
|
10kW
|
0.1kW
|
2A
|
40
|
50
|
Type Numbering
A switch is specified either by a MESL alpha-numeric part number or by a numeric one which is cross-referred to a customer specification. A MESL part number has the following format:
| 16 | - | 42 | E | DS | / | P | / | O | / | C | / | D | | | | 16 | WAVEGUIDE SIZE
The British Standard numbering of waveguide sizes is used. A conversion table to other designations and frequency is provided. | | 42 | SWITCH CONFIGURATION
The switch configuration is dictated by the number of ports incorporated in the switch stator and the number of channels through the switch rotor. The most common switch is the 4 port - 2 channel type (42). This is also known as a 'transfer' or DPDT switch. A 4 port - 2 channel can be configured as a 3 port - 2 channel (32) or SPDT switch by terminating one of the ports. | | E | FLANGES
The switches can accommodate any appropriate series of flange. The two standard series of flanges supplied by MESL are:- 'N' Series -- British mating flange with UNC threads. 'E' Series -- European 154-IEC mating flanges with metric threads. | | DS | ACTUATOR MECHANISM
(1) A manual switch has no designation.
(2) An electrically driven switch has one of the following designations.
(a) LATCHING SWITCHES. These use either, two solenoids, or a brushless motor and the letters 'DS' and 'BM' are used, respectively.
(b) FAIL SAFE SWITCHES. These use a single solenoid and the designating letters are 'FS'. The 'FS' holding current is typically 300mA.
(c) LARGE ROTOR SWITCHES. These are switches for waveguide sizes 11A and larger. They employ two solenoids in conjunction with a 'Geneva Mechanism'. They are denoted by the letter 'B' and have the same drive circuit as a 'DS' switch. | | P | POSITION INDICATION
'P' A simple tell-back facility, using a maximum of three micro-switches can be provided to indicate the position of the switch. This option is incorporated in a Fail Safe Switch and is not specified separately. | | O | MANUAL OVERRIDE
'O' All electrically operated, latching, switches can be fitted with a means of setting the switch by hand to one of its positions .This option is never fitted to the Fail Safe Switches. | | C | CIRCUIT INTERRUPT
'C' Electrically operated switches require a voltage pulse to change their state. This should be long enough to drive the switch firmly to the next home position and then be removed. If only a constant power source can be provided, or as a safety precaution, the fitting of this internal option ensures that the drive voltage will be removed when the home position has been reached. This option is incorporated in a Fail Safe Switch and is not specified separately. | | D | DIODE PROTECTION
'D' This option provides for the fitting of diodes across the drive motor supply lines to suppress the back e.m.f. generated. It is fitted automatically if the Circuit Interrupt option is selected and in those circumstances it does not need to be specified. | | - | PRESSURISATION
This is considered a special option and there is no designation letter. A low pressure of between 2 and 5 p.s.i. can easily be provided. It may be possible to give special consideration for a higher pressure to permit the switch to be operated at a higher peak power level than those specified for the waveguide size. | | - | KEYLOCK
This is considered a special option and there is no designation letter. For security or safety purposes this option will allow the switch to be manually locked in any position. The status of the lock can be monitored by circuitry in this option. |
|
Waveguide Frequency Range and Designation
| Frequency Range (GHz) |
Waveguide Designations |
| UK Standard |
European
153-IEC |
USA
RETMA |
| 1.14 - 1.73 |
WG 6 |
R14 |
WR 650 |
| 1.45 - 2.20 |
WG 7 |
R 18 |
WR 510 |
| 1.72 - 2.61 |
WG 8 |
R 22 |
WR 430 |
| 2.60 - 3.95 |
WG 10 |
R 32 |
WR 284 |
| 3.22 - 4.90 |
WG 11A |
R 40 |
WR 229 |
| 3.94 - 5.99 |
WG 12 |
R 48 |
WR 187 |
| 4.64 - 7.05 |
WG 13 |
R 58 |
WR 159 |
| 5.38 - 8.17 |
WG 14 |
R 70 |
WR 137 |
| 6.57 - 9.99 |
WG 15 |
R 84 |
WR 112 |
| 8.20 - 12.5 |
WG 16 |
R 100 |
WR 90 |
| 9.84 - 15.0 |
WG 17 |
R 120 |
WR 75 |
| 11.9 - 18.0 |
WG 18 |
R 140 |
WR 62 |
| 14.5 - 22.0 |
WG 19 |
R 180 |
WR 51 |
| 17.6 - 26.7 |
WG 20 |
R 220 |
WR 42 |
| 21.7 - 33.0 |
WG 21 |
R 260 |
WR 34 |
| 26.4 - 40.0 |
WG 22 |
R 320 |
WR 28 |
| 32.9 - 50.1 |
WG 23 |
R 400 |
WR 22 |
| 39.2 - 59.6 |
WG 24 |
R 500 |
WR 19 |
| 49.8 - 75.8 |
WG 25 |
R 620 |
WR 15 |