US 12,341,272 B2
Compact frequency adjustable portable antenna
Donald P. Labriola, II, La Verne, CA (US)
Assigned to Compact Antennas, LLC, Anchorage, AK (US)
Filed by Donald P. Labriola, II, La Verne, CA (US)
Filed on Jul. 21, 2022, as Appl. No. 17/870,811.
Claims priority of provisional application 63/224,391, filed on Jul. 21, 2021.
Prior Publication US 2023/0028251 A1, Jan. 26, 2023
Int. Cl. H04B 17/11 (2015.01); H01Q 9/30 (2006.01); H03J 5/02 (2006.01); H04W 24/02 (2009.01)
CPC H01Q 9/30 (2013.01) [H03J 5/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of operation of a compact frequency adjustable (CFA) portable antenna comprising:
measuring a frequency and a forward power value of broadcast transmission of the CFA portable antenna, the forward power measured at an RF input port of the CFA portable antenna;
calculating a valid frequency flag by comparing the frequency to one or more usable range thresholds to determine if the frequency is within a range of calibrated frequencies;
calculating a valid forward power flag by comparing the forward power to a forward power threshold;
retrieving a lower encoded motor step value and an upper encoded motor step value from a calibration table using a lower adjacent frequency and an upper adjacent frequency, the lower adjacent frequency and the upper adjacent frequency both adjacent to the frequency in the calibration table;
calculating an interpolated motor step value between the lower encoded motor step value and the upper encoded motor step value;
driving a motor to change a position of a contactor coupled to a tuning coil based on the interpolated motor step value, the contactor in contact with the tuning coil; and
comparing a voltage standing wave ratio (VSWR) to a VSWR threshold and triggering a second retrieval of the lower encoded motor step value and the upper encoded motor step value if the VSWR is greater than or equal to the VSWR threshold.