3H Communication Systems Inc. is a new highly innovative yet low cost design and manufacturing company headquartered in Irvine, CA with operations in Tijuana, Mexico. 3H specializes in RF front-end systems mainly Filters, Multiplexers, Switch Filter Banks and Multi-Function Assemblies for the commercial and military markets. 3H’s second to none expertise includes designing for High Power, Low PIM and DAS sub-assemblies solutions for the LTE, WiMax, CDMA, GSM, UMTS, TDMA, WiFi and other wireless markets.
The Tx and Rx Band provides >110 dB co-channel isolation while maintaining <1.0 dB Passbands insertion loss. Specifications include frequency bands: Tx: 640 to 650 MHz, Rx: 661 to 671 MHz, Tx to Rx rejection: >110 dB at 661 to 671 MHz, Rx to Tx Rejection: >100 dB at 640 to 650 MHz, Tx/Rx passband insertion loss: <1.0 dB as well as average power handling: up to 200 W.
3H Communication Systems model number XLCN400-30-7SS, is a leadless SMT bandpass filter with a notch integrated into the passband 
3H Communication Systems model number XLCN400-30-7SS, is a leadless SMT bandpass filter with a notch integrated into the passband. Insertion loss at 235 to 345 MHz is < 2.0 dB and < 2.5 at 435 to 465 MHz. The notch band is centered at 400 MHz with a 30 MHz notch band of >15 dB attenuation. The filter size is 0.74 L x 0.44 W x 0.27 H" and is suitable in tape and reel packaging.
3H Communication Systems designs and manufactures a complete line of Public Safety filters and multiplexers for First Responders for Land, Mobile, Marine and Aeronautical markets. The filter products are suited for VHF, UHF, 700, 800, 900 MHz and Tetra Bands. 3H filter products offer low insertion loss and >60 dB Co-Channel isolation.