Beverly Microwave Division

Pressure Windows

CPI manufactures and tests a wide variety of vacuum and pressure windows currently used in:
space / satellite; lab testing; and radar applications. CPI is able to manufacture pressure windows for high volume applications or design fully custom one-off windows to meet your project’s needs.

CPI features these pressure window materials:
  • Tef-glass: Great VSWR performance over full bandwidth; ideally used in low-power and low-pressure applications
  • Glass: Hermetic glass to metal sealed windows; great for low loss, vacuum and medium power applications
  • Quartz: Great for high-power (5+ KW of CW power) and high-pressure or vacuum applications; very low insertion loss windows and good VSWR performance over a wide variety of frequency ranges
  • Ceramic: Very high power-handling capabilities (10+ KW of CW power); can be liquid cooled or have cooling fins added to window to aid in prolonged high power operation
Though most of CPI BMD's windows are made with Glass, Quartz, Ceramic, or Tef-glass, ask about custom pressure window materials. CPI BMD can manufacture windows in waveguide sizes of WR10 to WR1000, including half-height configurations.

Download and complete the Pressure Window request form and let CPI BMD manufacture the right pressure window for you.
+1 (978) 922-6000 or +1 (978) 922-6004

CPI Pressure Window Capability Table
Product Description Frequency Band Peak Power (kW/MW) Insertion Loss (dB) VSWR
Pressure Windows L-Band 5 MW 0.1 1.15:1
Pressure Windows S-Band 3 MW 0.1 1.15:1
Pressure Windows C-Band 1 MW 0.1 1.15:1
Pressure Windows X-Band 500 kW 0.1 1.15:1
Pressure Windows Ku-Band 250 kW 0.1 1.15:1
Pressure Windows Ka-Band 100 kW 0.15 1.2:1
Pressure Windows W-Band 50 kW 0.2 1.2:1

CPI Pressure Bypass Window Capability Table
Product Description Frequency Band Peak Power (kW) Insertion Loss (dB) VSWR Particle Filter (um)
Pressure Bypass Windows L-Band 500 0.2 1.2:1 15
Pressure Bypass Windows S-Band 500 0.2 1.2:1 15
Pressure Bypass Windows C-Band 250 0.2 1.2:1 15
Pressure Bypass Windows X-Band 200 0.2 1.25:1 15
Pressure Bypass Windows Ku-Band 100 0.2 1.3:1 15
Pressure Bypass Windows Ka-Band 50 0.3 1.4:1 15