2450 MHz: Waveguide Components
| Isolators & Circulators |
A circulator is a passive, non-reciprocal device with three or more ports used to transmit microwave energy in a specific direction. Additionally, circulators are used to prevent reflected microwave energy from the magnetron preventing excessive magnetron heating or moding.
An isolator is a circulator with an absorbing load attaching to the port used to transmit the reflected energy is generated from the magnetron and is transmitted to the load port and absorbed. |
| Part Number |
Frequency
(MHz) |
Fwd. Power Maximum (kW) |
Reflected Power
Maximum (kW) |
Isolation
(dB) |
Waveguide Size |
Cooling |
Description |
2450.201.124.00
2450.201.873.00
2450.201.803.02 |
2450+/-10
2450+/-10
2450+/-10 |
30
30
20 |
30
15
20 |
>20
>20
>20 |
WR430
WR430
WR430 |
Water
Water
Water |
Circulator
Circulator
Circulator |
2722-162-10311
2722-162-10461
2722-162-10471
2722-162-02104
|
2450+/-10
2450+/-10
2450+/-10
2450+/-10 |
6.5
6.5
3
3
|
6.5
6.5
3
3
|
>20
>20
>20
>20 |
WR340
WR340
WR340
WR340 |
Water
Water
Water
Water
|
Isolator.
Input in-line w/ output.
Isolator.
Input 90° from output.
Isolator.
Input in-line w/ output.
Isolator.
Input 90° from output.
|
WR284CIRC6A
WR284CIRC3A |
2450+/-10
2450+/-10 |
6
3 |
6*
3* |
>20
>20 |
WR284
WR284 |
Water
Air |
Circulator
Circulator |
| *See specification for details. Time and duty of reflected power is specified. |
| Water Loads |
|
A water-load is used to absorb microwave energy from a system. It is often used as a test load for generators and as the terminating matched load in an isolator. |
 |
| Part Number |
Power Max. |
Frequency
(MHz) |
Flange Type |
Description |
| 2450.203.303.00 |
30 kW |
2450 |
WR430 |
30kW Dummy Load |
| 2450.203.203.01 |
20 kW |
2450 |
WR430 |
20kW Dummy Load |
| 2722-162-10511 |
6.5 kW |
2450 |
WR340 |
6.5kW Dummy Load |
| WR284LOAD6A |
6.0 kW |
2450 |
WR284 |
6.0kW Dummy Load |
| Tuners* |
|
Tuners are waveguide components used to match the load impedance. Tuners minimize the amount of reflected power, which results in the most efficient coupling of power to the load. Richardson Electronics supplies both manual 3 and 4 stub tuners. |
 |
| Waveguide Size |
Richardson Part Number |
Description |
Frequency
(MHz) |
Maximum Power
(kW) |
VSWR |
WR430
WR340
WR284 |
WR430TUNER3A
WR340TUNERA
WR284TUNER3A |
Three stub
Three stub
Three stub |
2450+/-25
2450+/-25
2450+/-25 |
6.0
6.0
6.0 |
3:1
3:1
3:1 |
| Auto Tuners
|
Auto-Tuners utilize motorized tuning stubs electronically controlled by a microprocessor to match the load impedance with the source impedance. The auto-tuner minimizes the amount of reflected power, which results in the most efficient coupling of power to the load. Auto-tuners are generally used in applications where the load impedance varies significantly during the heating process or between applications. |
| Waveguide Size |
Richardson Part Number |
Description |
Frequency
(MHz) |
Maximum Power
(kW) |
VSWR |
| WR284 |
WR284AUTOTUNER |
3-Stub Auto Tuner |
2450+/-25 |
6.0kW |
3:1 |
| WR340 |
WR340AUTOTUNE3A |
3-Stub Auto Tuner |
2450+/-25 |
6.0kW |
3:1 |
| WR430 |
WR430AUTOTUNE3A |
3-Stub Auto Tuner |
2450+/-25 |
up to 30kW |
3:1 |
| Bends |
Waveguide bends are used to change direction of the waveguide transmission system. |
| Waveguide Size |
Richardson Part Number |
Description |
Material |
| WR430 |
WR430EBBSB
WR430EBBSA
WR430HBBSB
WR430HBBSA |
E-Plane sweep bend
E-Plane sweep bend
H-Plane sweep bend
H-Plane sweep bend |
Brass
Aluminum
Brass
Aluminum |
| WR340 |
WR340EBBSB
WR340EBBSA
WR340HBBSB
WR340HBBSA
|
E-Plane sweep bend
E-Plane sweep bend
H-Plane sweep bend
H-Plane sweep bend
|
Brass
Aluminum
Brass
Aluminum |
| WR284 |
WR284EBBSB
WR284EBBSA
WR284HBBSB
WR284HBBSA |
E-Plane sweep bend
E-Plane sweep bend
E-Plane sweep bend
E-Plane sweep bend |
Brass
Aluminum
Brass
Aluminum |
| Waveguide Transitions |
| Waveguide transitions are used to connect between pieces of different waveguide size. |
 |
| Richardson Part Number |
Description |
Material |
| WR340/284TRANSA |
WR340 to WR284 waveguide transition |
Aluminum |
| WR430/284TRANSA |
WR430 to WR284 waveguide transition |
Aluminum |
| WR430/340TRANSA |
WR430 to WR340 waveguide transition |
Aluminum |
| Couplers |
Directional Couplers are waveguide components used to measure forward or/and reflected microwave energy. Richardson Electronics supplies two types of couplers used to meet the microwave system requirements. One type of directional coupler uses a loop terminated in a matching load at one end and an "N-Type" connector for a power sensory and meter at the other end. The second type of directional coupler uses diode detectors to measure the power levels, which is then displayed on an analog meter box (galvanometer). |
| Waveguide Size |
Richardson Part Number |
Description |
Frequency (MHz) |
Coupling Factor (dB) |
Directivity (dB) |
| WR430 |
WR430DDCN*
WR430DDCA'
WR430DDCB' |
N-Type connectors
Detector diodes, BNC connectors
Detector diodes, meters |
2450+/-25
2450+/-25
2450+/-25 |
60
N/A
N/A |
>20
>20
>20 |
| WR340 |
WR340DDCN*
WR340DDCA'
WR340DDCB'
|
N-Type connectors
Detector diodes, BNC connectors
Detector diodes, meters |
2450+/-25
2450+/-25
2450+/-25 |
60
N/A
N/A |
>20
>20
>20 |
| WR284 |
WR284DDCN*
WR284DDCA'
WR284DDCB'
|
N-Type connectors
Detector diodes, BNC connectors
Detector diodes, meters |
2450+/-25
2450+/-25
2450+/-25 |
60
N/A
N/A |
>20
>20
>20 |
| Coax Transitions |
Coaxial transitions are waveguide components used to convert standard waveguide to a specific coaxial connector. |
| Waveguide Size |
Richardson Part Number |
Description |
Max. Power
(kW) |
VSWR |
| WR430 |
WR430/COAXTRANS
WR430/COAX7/16
WR430/COAX7/8
WR430/COAX1-5/8 |
Waveguide to N-Type connector
Waveguide to 7/16"
Waveguide to 7/8"
Waveguide to 1 5/8" |
.300
1.2
2.0
5.0 |
<1.15
<1.15
<1.15
<1.15 |
| WR340 |
WR340/COAXTRANS
WR340/COAX7/16
WR340/COAX7/8
WR340/COAX1-5/8 |
Waveguide to N-Type connector
Waveguide to 7/16"
Waveguide to 7/8"
Waveguide to 1 5/8" |
.300
1.2
2.0
5.0 |
<1.15
<1.15
<1.15
<1.15 |
| WR284 |
WR284/COAXTRANS
WR284/COAX7/16
WR284/COAX7/8
WR284/COAX1-5/8 |
Waveguide to N-Type connector
Waveguide to 7/16"
Waveguide to 7/8"
Waveguide to 1 5/8" |
.300
1.2
2.0
5.0 |
<1.15
<1.15
<1.15
<1.15 |
| Straight Sections |
|
Richardson Electronics offers straight sections and flanges of waveguide both in standard and custom lengths. Straight waveguide is supplied either as a raw cut waveguide section or with the attached flanges. The dimension of a straight waveguide piece is measured from face to face of the flanges. |
| Waveguide Size |
Richardson Part Number |
Material |
|
WR430
WR340
WR284
|
WR430WGXXXXB
WR430WGXXXXA
WR340WGXXXXB
WR340WGXXXXA
WR284WGXXXXB
WR284WGXXXXA |
Brass
Aluminum
Brass
Aluminum
Brass
Aluminum |
 |
| Flanges |
| Waveguide flanges are used to connect waveguide sections to one another. |
| Waveguide Size |
Richardson Part Number |
Description |
|
WR430
|
WR430FLAN1
WR430FLAN2
WR430FLAN3
WR430FLAN4 |
Brass, Flat, Pocket
Brass, Choke, Pocket
Aluminum, Flat, Pocket
Aluminum, Choke, Pocket |
 |
| WR340 |
WR340FLAN1
WR340FLAN2
WR340FLAN3
WR340FLAN4
WR340FLAN5 |
Brass, Flat, Pocket
Brass, Choke, Pocket
Aluminum, Flat, Pocket
Aluminum, Choke, Pocket
Stainless Steel, Choke, Pocket |
| WR284 |
WR284FLAN1
WR284FLAN2
WR284FLAN3
WR284FLAN4 |
Brass, Flat, Pocket
Brass, Choke, Pocket
Aluminum, Flat, Pocket
Aluminum, Choke, Pocket |
|
