CMI can supply Single and Multi-Frequency Antenna Feeds configured for circular or linear polarization by using a combination of its Horns, Multi-Frequency Feed Networks, Polarizers, OMTs, Diplexers, and OMT/Polarizers. Each Antenna Feed is precisely designed as an assembly, to include interactions between all the components in the feed chain, for optimum performance, size, and manufacturability. By combining precision CAD tools, design techniques, and precise fabrication, CMI can produce these high performance devices with no tuning screws. This leads to improved power handling, very low PIM, and the elimination of bench tuning. Depending on the application, the Antenna Feeds are manufactured by direct machining/EDM and/or by copper electroforming to provide very low PIM by minimizing joints.
CMI can custom design multi-frequency feed networks to meet your specific RF, Mechanical, and layout needs.

• No Tuning Screws
• Tx Bandwidth 15%
• Rx Bandwidth 9%
• Tx - Rx Isolation > 55 dB
• Insertion Loss < 0.15 dB Tx & 0.05 dB Rx
• Crosspol Radiation < -35 dB
• On Axis AR < 0.2 dB Tx & < 0.1 dB Rx
• Multipaction Threshhold > 9kW
• PIM < -140 dBm
• Size 12"x12"x29" with horn

• No Tuning Screws
• 16% Bandwidth
• > 250°C Operating Range
• Return Loss > 30 dB
• Insertion Loss < 0.05 dB
• Crosspolar < -25 dB within ± 80°
• On Axis AR < 0.2 dB
• Size 2.6" Ø x 4.0" long (less bend)