11 dB Bi-directional Coupler 10 - 500 MHz CH-138 V2.00 TO-8-2 Features ● Constant Coupling — Within ±0.5 dB Max Guaranteed Specifications* Bottom of Case is AC Ground. Dimensions in ( ) are in mm. Unless Otherwise Noted: .xxx = ±0.010 (.xx = ±0.25) .xx = ±0.02 (.x = ±0.5) Operating Characteristics * All specifications apply with 50 ohm source and load impedance. This product contains elements protected by United States Patent Number 3,426,298. **Includes theoretical power split. Functional Diagram Ordering Information Part Number CH-138 PIN Package TO-8-2 M/A-COM Division of AMP Incorporated ■ North America: Tel. (800) 366-2266, Fax (800) 618-8883 ■ Asia/Pacific: Tel. +85 2 2111 8088, Fax +85 2 2111 8087 ■ Europe: Tel. +44 (1344) 869 595, Fax +44 (1344) 300 020 www.macom.com AMP and Connecting at a Higher Level are trademarks. Specifications subject to change without notice. 5-26 CH-138 11 dB Bi-directional Coupler V2.00 MAIN LINE LOSS TOTAL LOSS dB MAIN LINE LOSS (dB) ABOVE 0.46 dB POWER SPLIT Typical Performance FREQUENCY (MHz) DIRECTIVITY dB DIRECTIVITY FREQUENCY (MHz) VSWR VSWR FREQUENCY (MHz) COUPLING dB REFERENCE TO INPUT COUPLING FREQUENCY (MHz) M/A-COM Division of AMP Incorporated ■ North America: Tel. (800) 366-2266, Fax (800) 618-8883 ■ Asia/Pacific: Tel. +85 2 2111 8088, Fax +85 2 2111 8087 ■ Europe: Tel. +44 (1344) 869 595, Fax +44 (1344) 300 020 www.macom.com AMP and Connecting at a Higher Level are trademarks. Specifications subject to change without notice. 5-27