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A bidirectional amplifier (BDA), also known as a bi‑amp or repeater amplifier, combines a low noise amplifier (LNA) for the receive path and a high power amplifier (HPA) for the transmit path, sharing a common antenna port. These devices are used to extend the range of wireless systems, compensate for cable losses, or overcome poor signal penetration in buildings, vehicles, and ships. Bidirectional amplifiers are typically deployed in licensed or ISM bands under strict regulatory frameworks and are sold only to authorised OEMs, licensed operators, or military customers. Proper filtering, gain management, and oscillation detection are essential to prevent network interference.
Unlike separate transmit and receive chains, a bidirectional amplifier saves space, weight, and antenna ports by using RF switches or circulators to share a single antenna. The main design challenges are isolation between transmit and receive paths, noise figure degradation, and maintaining stability when antenna load varies. High‑quality BDAs include automatic gain control (AGC), transmit/receive switching logic, and band‑pass filtering to reject out‑of‑band signals. They are not consumer boosters – they require professional installation and licensing
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Showing 14 of 25 products
