DDC-1 Dual Directional Coupler

From: $175.50

NIST Calibration Certificate

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SKU: DDC-1 Category:


The DDC-1 dual directional coupler measures forward and reflected power of a device in a 50 ohm environment.  It is more precise than a simple SWR meter since the reflected and forward power may be observed directly on an oscilloscope.

The RF IN port connects to the HF signal source. This source is normally the transmitter and or linear HF amplifier. The RF OUT connects to a 50 ohm load. This load can be a transmission line, antenna, or a dummy load. When the load completely absorbs the energy from the signal source, little if any power is reflected, thus, the signal output from the REFLECTED port is very low. The signal out of the FWD port indicates the amount of power (– 30 dB) going to the load.

Note: Now shipped with BNC connectors for RF IN and RF OUT (SO239 or Type N adapters available)








datasheet DDS-1 v3


Additional information

Weight .25 lbs
Dimensions 2.5 × 1.4 × 1.2 in

Max input power: 1,500 Watt PEP crest factor 4:1 Insertion loss: Negligible (< .1 dB) Bandwidth REFLECTED: 1-100 MHz Bandwidth FWD: 1-100 0MHz VSWR: 1.1:1 or better Return Loss: > -25dB Coupling: FWD and REFLECTED port -30dB +/- 2db Directivity: 30dB typically 40 dB Connectors RF IN/OUT SO-239 Connectors FWD/REFLECTED: BNC


Measuring reflected and forward power with an oscilloscope of transmission lines, antennas and other 50 ohm loads.


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