Cobham Signal & Control Solutions

Cobham Signal & Control Solutions (formerly Aeroflex Signal & Control Solutions) is a leading supplier of high performance solid-state RF and microwave components and subsystems.

Call: 732-460-0212 / 855-366-2727

Analog Diode Phase Shifters

Cobham Signal & Control Solutions - Analog Phase Shifters

An Analog Phase Shifter Continuously Changes the phase of a microwave signal by varying a DC voltage. Since the DC voltage applied to the diode is reverse bias, the current drain is negligible (typically less than 10uA). A Balanced stripline configuration keeps the VSWR and amplitude ripple to a minimum for all values of phase.


  • Octave bands up to 18GHz
  • Fast Phase responce as low as 10nS
  • RF power operation 10mW peak/CW, RF power survival 100mW peak/CW
  • Bias connection using pin or connector options
  • Custom configurations available

Signal & Control Catalog

  • Click here to download or request a mailed copy of our latest catalog.

Download our latest catalog

Continuously Variable
View PDF
(dB max)
(+/-dB Max)
PQ-170.25 - 0.53604.51.25210
PQ-270.5 - 1.018040.41.753
PQ-280.5 - 1.036051.2524
PQ-341 - 23605.51.528
PQ-442 - 418040.51.753
PQ-452 - 436061.525
PQ-594 - 8401.250.31.752
PQ-604 - 836081.529
PQ-667 - 123601422.59
PQ-728 - 126020.522
PQ-738 - 101806127
Mechanical Outlines
12.752.251.382.052.250.533 PLS PLS
35.002.00N/A1.804.500.254 PLS
47.752.50N/A2.307.250.254 PLS
56.502.00N/A1.806.000.254 PLS PLS PLS
86.502.50N/A2.306.000.254 PLS
95.002.00N/A1.804.500.504 PLS
107.752.50N/A2.307.250.754 PLS


  1. Monotonicity is Guaranteed.
  2. The Phase shift varies with frequency at any voltage setting. This variation, referenced to 0° at logic 0 for each frequency, is approximately ±15% for octave models, 10% for models with 25% bandwidth, and ±7.5% for models with 10% bandwidth. Phase flatness of the QQ-65 & QQ-74 is ±25%.
  3. A Connector, (SMA Female) is available in place of the bias pin at no extra charge. This will be placed at the center of the surface marked "H" on the drawing. This is the .38 x "A" surface. If a SMA Female is desired, add the suffix "C" to the model number (e.g., PQ-45C)
  4. Linearization models available, call for outline and details.

Additional Electrical Specifications:

DC Supply:+5V ±0.5V @ +275mA
-5V ±0.5V @ -50mA
Control:8 Bits command
1 Strobe line
Positive edge latched
Logic Levels:TTL/HMOS
Attenuation Accuracy:+/-0.15 dB or +/-1.5% (whichever is greater)
Attenuation Stability over Temperature:+/-0.025 dB/°C

Mechanical Specifications:

Case StylePQ Outline
ConnectorsSMA Female per MIL-C-39012
Control ConnectorMicro-D 21 Pin
Bias & Control Pinsø0.02” x 0.15” long
Mountingø0.10” through holes (4) places

Environmental Specifications:

MIL-E-5400, MIL-STD-202, MIL-E-16400
Operating Temp-30°C to +70°C
Storage Temp-55°C to +125°C
HumidityMIL-STD-202F, M103, Cond B
ShockMIL-STD-202F, M213, Cond B
AltitudeMIL-STD-202F, M105, Cond B
VibrationMIL-STD-202F, M204, Cond B
Thermal ShockMIL-STD-202F, M107, Cond A
Temperature CycleMIL-STD-202F, M105C, Cond D


Internal Visual per MIL-STD-883, Method 2017
Temperature Cycle: -65°C to +100°C, 10 cycles
Hermetically-sealed phase shifters are fine and gross leak checked per MIL-STD-883, Method 1014
Optional High-Rel screening available upon request.
Contact the factory to discuss your screening requirements

Outline Case Style PQ

Custom Options - Contact Factory

  • Gray epoxy paint per MIL-C-22750
  • Video transient suppression
  • GPO connectors
  • ECL logic input
  • Phase and amplitude tracking
  • Other frequency ranges available from 1MHz to 26GHz
  • Reversed logic
  • Available without SMA connectors for drop-in applications
  • High-Rel screening