Coaxial Receiver Protector

X Band coaxial limiter

Where size, weight and power handling are the principle constraints, a Teledyne Microwave UK air-spaced coaxial limiter range provides an excellent compromise between waveguide and microstrip limiters. These devices are able to withstand higher power levels than microstrip solutions but still retaining a relatively compact package, Teledyne Microwave UK’s designs offer a low insertion loss and incorporate the same wide range of features as our waveguide limiters. Suitable for continuous operation at peak power levels of several kW's and mean power levels of 100's watts with sub- microsecond recovery time - over 10% bandwidth in <100mm length (at S-Band).

Coaxial Limiters At a Glance

Multiple stages concatenated to increase the overall level of attenuation ensuring lowest possible leakage levels
Parallel PIN diode elements increase the power capabilities whilst maintaining fast switching thereby ensuring swift recovery from high isolation to low insertion loss state - improving short-range radar capabilities.
Passive Schottky bias networks improving power withstand and switch-on times.
Digital or analogue controlled attenuation
STC (sensitivity time control)
Noise source
Transitions between RF media (waveguide / coax / stripline)
Built in test equipment (BITE)
Blanking
Power detectors
ITAR Free

Common Specifications

Operating Band Frequency (GHz)	Bandwidth (GHz)	Peak Operating Power (kW)	Pulse Width (µs)	Duty Cycle (%)	V.S.W.R. (ratio)	Insertion Loss (dB)	Flat Leakage (mW)	Spike Leakage (mW)	Recovery (-3dB) (µs)
1.0-1.2	0.2	2	70	1	1.4 : 1	0.3	100	200	3
207-2.9	0.2	0.25	100	10	1.4 : 1	0.3	100	500	0.1
2.7-3.1	0.4	3	100	10	1.4 : 1	0.6	100	500	1

Additional Information

X Band Coaxial Limiter

Teledyne Microwave UK uses our custom packaged PIN diode designs across our range of coaxial limiters.

The PIN diode is embodied in an air-spaced coaxial structure, providing the high levels of isolation required to protect sensitive receiver elements whilst retaining the characteristically low insertion loss.

The higher power limiter options incorporate multiple PIN diodes in each stage with passive Schottky diode bias networks to extract maximum power handling from the PIN diodes. This design approach optimises the peak operating power without compromising other performance parameters.

Additional system functions can be incorporated within the limiter offering a net SWaP-C (Size, Weight and Power - Cost) benefit over discrete components.