RayCoupler Directional Coupler

RayCoupler is a tandem-match HF/VHF directional coupler that provides low-distortion forward and reflected sample outputs for instrumentation or controller inputs. The board is available in two builds: a 200 W variant for bench/driver chains and a 2 kW high-power variant for linear amplifiers.

The sampling network targets approximately −58 dB (fixed resistor ladder) and is compatible with ADC front-ends (e.g., ADS1115), detector ICs (e.g., AD8307) or SDR (e.g., ANAN PureSignal) used by your station controller. It integrates seamlessly with RaySspaController for protection logic (SWR, over-drive) and connects inline via RayRigAntSw.

Both RayCoupler variants include an onboard square-wave frequency generator derived from the RF sample line. This enables an attached MCU (such as the RaySspaController) to automatically determine the operating band and switch low-pass filters or antenna relays accordingly. The output is a TTL-level square wave (÷4 prescaler) proportional to transmit frequency, suitable for direct measurement using a timer or frequency-counter input pin.