Haigh-Farr’s thin, rugged GPS antennas are available at the L1 frequency or at both L1 and L2 in a single connector. GPS combined with other bands, such as S-band telemetry with integrated notch filters in a single package, are increasingly popular for area and weight reduction. Isolation levels of -30 to -40 dB with minimal insertion loss of 0.3 dB are typical.