Twists & Taper Transitions


Precision Twists

Standard Rectangular

Specification:
V.S.W.R: Values for through flanges and up to 90 degree twists
Power: Values at F =  1.5 Fc for 90 degree twists
Material: Aluminium, Copper
Finish: Blue Paint, Iridited aluminium flanges

Alternative lengths or alternative angles of twist (anti-clockwise) available on request.

Double Ridge

Specification:
V.S.W.R: Values for through flanges and up to 90 degree twists
Power: Values at F =  1.5 Fc for 90 degree twists
Material: Aluminium
Finish: Blue Paint, iridited aluminium flanges

PT

Product code
PT = precision twist

16

Waveguide size
British WG size for rectangular waveguide or MIL spec. WRD size for double ridge waveguide
e.g. 16 = WG16; 750 = WRD750
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S

Type
S = clockwise
A = anticlockwise

Q

Paint
Q = TWS blue (preferred)
B = black
G = grey

Z

Finish
Z = unplated (preferred for brass / copper)
M = passivate (option for brass)
F = Iridite (preferred for aluminium)
H = chromate
A = tin
B = silver
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402

Flange type (end1)
Last 3 digits from the TWS flange part no.
e.g. 402 = UBR flange

402

Flange type (end2)
Last 3 digits from the TWS flange part no.
e.g. 402 = UBR flange

B

Material
A = aluminium
B = brass (rectangular wg only)
C = copper (rectangular wg only)

90

Angle
30 = 30 deg (standard)
45 = 45 deg (standard)
60 = 60 deg (standard)
90 = 90 deg (standard)

Notes
1) Bend angles between 0 and 180 deg available on request
2) Flange and tube materials should match

Micro Twists

The machined micro twist is ideal for applications needing a 90 degree twist in polarisation in a small space. It is particularly useful at lower frequencies where the saving in weight and space can be significant

The machined twist typically covers half a waveguide band.
Please contact the company for ordering information

Taper Transitions

Standard Rectangular to Rectangular

Specification:
VSWR: Please refer to table
Material: Copper electroform or machined aluminium / brass fabrication
Finish: Blue paint, unplated (preferred for brass/ copper) / silver / iridite (preferred for aluminium) flanges

H = Half Height Waveguide
F = Quarter Height Waveguide
99 = Non Standard Waveguide Size

Standard Rectangular to Double Ridge

Specification:
VSWR: Please refer to table
Material: machined aluminium or brass fabrication
Finish: Blue paint, silver or chromated / iridited flanges

Standard Double Ridge to Double Ridge

Specification:
VSWR: Please refer to table
Material: machined aluminium
Finish: Blue paint, chromated / iridited flanges

TT

Product code
TT = taper transition

16

Primary waveguide size
British WG size for rectangular waveguide or MIL spec. WRD size for double ridge waveguide
e.g. 16 = WG16; 750 = WRD750
More

S

Type
S = standard

Q

Paint
Q = TWS blue (preferred)
B = black
G grey

Z

Finish
Z = unplated (preferred for brass / copper)
M = passivate (option for brass)
F = Iridite (preferred for aluminium)
H = chromate
A = tin
B = silver
More

402

Flange type (end1)
Last 3 digits from the TWS flange part no.
e.g. 402 = UBR flange

402

Flange type (end2)
Last 3 digits from the TWS flange part no.
e.g. 402 = UBR flange

B

Material
A = aluminium
B = brass (rectangular wg only)
C = copper (rectangular wg only)

17

Secondary waveguide size
“British WG size for rectangular waveguide or MIL spec. WRD size for double ridge waveguide
e.g. 17 = WG17; 750 = WRD750