Which connector is suitable for frequencies above 400 MHz?

The Type N connector is designed specifically to perform well at high frequencies, making it suitable for operations above 400 MHz. This connector features a rugged and reliable design that includes a threaded coupling mechanism, which ensures a very secure connection and minimizes signal loss due to vibrations or disconnections. The design and construction of the Type N connector allow it to maintain its performance over a wide frequency range up to several gigahertz, making it ideal for applications in both commercial and amateur radio settings.

The other connectors mentioned are not optimized for use at frequencies above 400 MHz. The UHF (PL-259/SO-239) connector, although commonly used, has performance limitations at higher frequencies due to its design. The RS-213 and DB-23 connectors are not typically referenced in high-frequency applications and lack the specifications that would make them suitable for such use. Thus, the Type N connector is the preferred option for ensuring signal integrity and performance in high-frequency scenarios.