Abstract: The present disclosure includes an embodiment of a miniaturized antenna system and methods for compact multi-band transmission and reception of radio signals in a high-frequency (HF) band. An embodiment of the antenna system may include a plurality of shortwave antennas arranged in an antenna cluster, one or more controllers, and one or more monitors. The embodiment of the antenna system may allow the antenna cluster to operate effectively without a plurality of switches over a plurality of HF band frequencies. An embodiment of the one or more controllers may include a frequency testing and acknowledgement circuit that may determine and confirm which frequencies are propagating.

Abstract: The described disclosure presents embodiments of an efficient shortwave radio technique using a network of multiple sites located in and around an operating region (e.g., continental USA), calibrated distributed beacons, a detailed knowledge of ionospheric behavior, and sophisticated operational tools and software, that geo-locates targets without depending on satellites. The embodiments of the technique described herein, for example, accurately may locate a target by utilizing remote field units, a network of radio receive sites, receivers that accept and time stamp pertinent signals, demodulators that recognize and extract meaningful data from received signals, communications from all receive sites to a Network Operations Center (NOC), communications from NOC to field units to keep shortwave channel choices relevant and effective, and a processor within the NOC that analyzes and evaluates data.

Abstract: The present disclosure includes an embodiment of a miniaturized antenna system and methods for compact multi-band transmission and reception of radio signals in a high-frequency (HF) band. An embodiment of the antenna system may include a plurality of shortwave antennas arranged in an antenna cluster, one or more controllers, and one or more monitors. The embodiment of the antenna system may allow the antenna cluster to operate effectively without a plurality of switches over a plurality of HF band frequencies. An embodiment of the one or more controllers may include a frequency testing and acknowledgement circuit that may determine and confirm which frequencies are propagating.

Abstract: The described disclosure presents embodiments of an efficient shortwave radio technique using a network of multiple sites located in and around an operating region (e.g., continental USA), calibrated distributed beacons, a detailed knowledge of ionospheric behavior, and sophisticated operational tools and software, that geo-locates targets without depending on satellites. The embodiments of the technique described herein, for example, accurately may locate a target by utilizing remote field units, a network of radio receive sites, receivers that accept and time stamp pertinent signals, demodulators that recognize and extract meaningful data from received signals, communications from all receive sites to a Network Operations Center (NOC), communications from NOC to field units to keep shortwave channel choices relevant and effective, and a processor within the NOC that analyzes and evaluates data.