Tank Circuit LF Antenna

Premo Group's DCF and ripple control antenna is a through-hole antenna for applications using atomic watch signals. These long wave transmittersuse FSK modulation with frequency precision of +/- 107 Hz and signal speed of200 Bd. RCA-THT antenna can be set and tuned in different frequencies from40kHz to 139kHz, for clock applications (synchronization with atomic clock, 40and 60kHz in Japan, 77.5 kHz in Germany, etc.) and power control and managementapplications (tariff switching and load management), lightingcontrols and smart metering.

The component is supplied in plastic trays and theantenna is shipped tuned to the resonant frequency specified. The fine tuningprocess is done in the Premo production line by a high reliable automaticstation. This station checks the antenna in real-time, achieving a highprecision in the centre frequency tuned.

These kind of antennas are configured as L-C resonant parallel tank (RCA-THT-77A: 1.3mH //3.3nF for 77.5 kHz and RCA-THT-60A: 2.1mH // 3.3nF for 60 kHz) which offer ahigher resistance (more than 75 kOhms) at resonance frequency (+/- 0.2 kHz).

Tank Circuit LF Antenna