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The coaxial to waveguide transition (orthomode structure) & Circular Waveguide Coaxial Converter

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Product Description

The product is widely used in microwave measurements, microwave equipment, microwave systems, and microwave engineering. It can be classified into two major types based on the position of the coaxial output end - orthogonal junctions and end junction structures. The standard waveguide types include rectangular, flat rectangular, medium flat rectangular, circular, square, single and double ridges. 

The coaxial connector types include N, TNC, L29, SMA, 3.5mm, 1.85mm, 2.92mm, and 2.4mm, among others. 

The frequency coverage of the circular waveguide coaxial converter is 1.76~38.8GHz, and the waveguide specifications range from BY18 (C18) to BY290 (C290). 

The coaxial to waveguide transition (orthomode structure) covers a frequency range of 0.32-100 GHz, with waveguide specifications from BJ3 (WR2300) to BJ900 (WR10). The VSWR ≤1.25 throughout the entire waveguide bandwidth, and ≤1.6 (66-86 GHz and 90-100 GHz.)

The frequency coverage of the  terminal structure waveguide coaxial converter is 0.32~50GHz, and the waveguide specifications range from BJ3(WR2300) to BJ620(WR15).

The VSWR is ≤1.2 (maximum) and ≤1.15 (typical) within the entire waveguide bandwidth, and it has characteristics such as complete bandwidth, specification variety, low VSWR, and low insertion loss. 


The base materials are copper and aluminum, and the surface treatment methods include silver plating, gold plating, nickel plating, passivation, and conductive oxidation. The product’s external dimensions, flanges, connector types, materials, surface treatments, and electrical indicators can be customized. 


Picture 1 is a coaxial to waveguide transition (orthomode structure), typical specifications are as following:


Product ModelFrequency(GHz)VSWR (dB)Loss(dB)

Average Powe
r(w)

Connector Type

Leng
h(mm)

FlangeMaterial & Coating
AMT-3WCAN0.32-0.49≤1.25
≤0.2100
N-K500FDPAluminum+Oxide
AMT-9WCAN0.75-1.15≤1.25≤0.2100N-K209FDPAluminum+Oxide
AMT-22WCAN3.95-5.85≤1.25≤0.2100N-K100FDPAluminum+Oxide
AMT-40WCAN3.22-4.90≤1.25≤0.2100N-K100FDPAluminum+Oxide
AMT-58WCAS4.64-7.05≤1.25≤0.250SMA-K52FDPAluminum+Oxide
AMT-70WCAS5.38-8.17≤1.25≤0.350SMA-K45FDPCopper+SilverPlating
AMT-100WCAS8.2-12.4≤1.25≤0.350
SMA-K33FBPCopper+SilverPlating
AMT-220WCAS17.6-26.0≤1.25≤0.330SMA-K25FBPCopper+SilverPlating
AMT-260WCAK21.7-33.0≤1.25≤0.3502.92-K30FBPCopper+GoldPlating
AMT-400WCAV1.8533.0-50.0≤1.5≤0.5302.4-K26FUGPCopper+GoldPlating
AMT-620WCA1.8555.0-65.0≤1.8≤0.8101.85-K18FUGPCopper+GoldPlating
AMT-740WCA1.066.0-86.0≤1.6≤1.0101.0-K23FUGPCopper+GoldPlating
AMT-900WCA1.090.0-100.0≤1.6≤1.0101.0-K23FUGPCopper+GoldPlating


Picture 2 is a circular coaxial to waveguide converter, typical specifications are as following:

Product Model

Frequency(GHz)

Work bandwidth

Connector Type

VSWR (dB)

Loss(dB)

Diameter(mm)  

AMT18NRA24

1.76-2.42

≤20%

N-K

1.2

0.3

114.58

AMT22NRA24

2.07-2.83

≤20%

N-K

1.2

0.3

97.87

AMT25NRA24

2.42-3.31

≤20%

N-K

1.2

0.3

83.62

AMT30NRA24

2.83-3.88

≤20%

N-K

1.2

0.3

71.42

AMT35NRA24

3.31-4.54

≤20%

N-K

1.2

0.3

61.04

AMT40NRA24

3.89-5.33

≤20%

N-K

1.2

0.3

51.99

AMT48NRA24

4.54-6.23

≤20%

N-K

1.2

0.3

44.45

AMT56NRA24

5.3-7.27

≤20%

N-K

1.2

0.3

38.1

AMT65NRA24

6.21-8.51

≤20%

N-K

1.2

0.3

32.537

AMT76NRA24

7.27-9.97

≤20%

N-K

1.2

0.3

27.7

AMT89NRA24

8.49-11.6

≤20%

N-K

1.2

0.3

23.825

AMT104SRA24

9.97-13.7

≤20%

N-K

1.2

0.3

20.244

AMT120SRA24

11.6-15.9

≤20%

SMA-K

1.2

0.3

17.415

AMT140SRA24

13.4-18.4

≤20%

SMA-K

1.2

0.3

15.088

AMT165SRA24

15.9-21.8

≤20%

SMA-K

1.2

0.3

12.7

AMT190SRA24

18.2-24.9

≤20%

SMA-K

1.2

0.3

11.125

AMT220KRA24

21.2-29.1

≤20%

2.92-K

1.2

0.4

9.525

AMT225KRA24

24.3-33.2

≤15%

2.92-K

1.2

0.4

8.331

AMT290KRA24

28.3-38.8

≤15%

2.92-K

1.2

0.4

7.137



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