S67-1575-232: This is an active conformal L1 GPS antenna currently operational on the Gulfstream GV. A 29.5 dB amplifier is integrated in the antenna housing, which includes band pass filtering to provide out-of-band rejection. The antenna has an internal voltage regulator and accepts +4 to +24 VDC. D.C. bias is provded through the center conductor of the connector. This antenna provides omni-directional coverage with a minimum gain of +3 dBic at zenith. The O.M.L. of the antenna may be changed to meet your specific requirements. The antenna is furnished with a right angle TNC connector and weighs nine (9) ounces.
Two receivers of the same electrical design could interfere with each other if placed in close proximity since the processing signals from one receiver could radiate from its antenna and cause interference to another. It is hard to tell the exact level of degradation since this would likely be a function of the designs and the mutual proximity. Combinations of other signals in the environment could produce inter-modulation that would be disruptive to the GPS receiver, but I have never witnessed it in person. The high speed digital circuits in PCs can radiate interference to GPS receivers.