RF Filter for ETC(Electronic Toll Collection System)
ETC gates have commucation antennas which conduct interactive-radio-communications with devices in cars. Since frequency bands of transmitting & receiving are close each other in ETC systems, high quality filter-duplexer is indispensable. We have already introuced low-loss filters to ETC systems.
![](https://www.tmele.jp/en2020/wp-content/themes/tamagawadenshi/images/case/case03_infra02_etc_0.jpg)