KR Electronics, Inc. KR 2401 Surface Mount Diplexer www.krfilters.com General Description KR Electronics 2401 is a high performance diplexer filter supplied in a small surface mount package. It features a lowband filter from dc to 42 MHz and a highband filter from 54 to 870 MHz. Impedance at all ports is 75 Ω. Crossover isolation is 25 dB or better. Features • Small surface mount package • 42 / 54 MHz frequency split • Return loss 20 dB or better • Crossover isolation 25 dB or better Specifications Parameter Specification Typical < 1.2 dB 1 dB > 60 dB attenuation 65 dB > 20 dB 25 dB < 1.2 1.12 < 1.2 dB 1 dB > 60 dB attenuation 65 dB > 20 dB 25 dB < 1.2 1.12 Cross over isolation > 25 dB 30 dB Impedance all ports 75 Ω Lowband Filter Passband 5 to 42 MHz Stopband 54 MHz to 870 MHz Return Loss to 42 MHz VSWR to 42 MHz Highband Filter Passband 54 to 870 MHz Stopband dc to 42 MHz Return Loss 54 to 870 MHz VSWR 54 to 870 MHz KR Electronics, Inc. 91 Avenel Street Avenel, NJ 07001 © 2001, KR Electronics, Inc. Web Email Phone Fax www.krfilters.com [email protected] (732) 636-1900 (732) 636-1982 Page 1 KR Electronics, Inc. www.krfilters.com KR 2401 Diplexer Filter Typical Performance Lowband Filter Response Highband Filter Response (10 dB/div) 1 MHz to 1 GHz (10 dB/div) 1 MHz to 1 GHz 22 May 2001 08:40:37 CH1 S21 LOG 10 dB/ 22 May 2001 08:43:21 REF 0 dB CH2 S31 LOG 10 dB/ REF 0 dB PRm Cor PRm Cor START 1 . 000 000 MHz STOP 1 000 . 000 000 START MHz 1 . 000 000 MHz STOP Figure 1 S32 Isolation Return Loss (10 dB/div) 1 MHz to 1 GHz (5 dB/div) 1 MHz to 1 GHz LOG 10 dB/ 000 MHz Figure 2 22 May 2001 08:54:09 22 May 2001 08:45:02 CH2 870 . 000 CH1 REF 0 dB S11 LOG 5 dB/ REF 0 dB PRm Cor PRm Cor START 1 . 000 000 MHz STOP Figure 3 © 2001, KR Electronics, Inc. 870 . 000 000 MHz START 1 . 000 000 MHz STOP 1 000 . 000 000 MHz Figure 4 Page 2 KR Electronics, Inc. www.krfilters.com KR 2401 Diplexer Filter Physical Dimensions Recommended PCB Layout KR Electronics, Inc. 91 Avenel Street Avenel, NJ 07001 © 2001, KR Electronics, Inc. Web Email Phone Fax www.krfilters.com [email protected] (732) 636-1900 (732) 636-1982 Page 3