US 12,142,830 B2
Wide range frequency tunable cubesat antenna
Rifaqat Hussain, Dhahran (SA)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed on Feb. 15, 2023, as Appl. No. 18/169,570.
Prior Publication US 2024/0275062 A1, Aug. 15, 2024
Int. Cl. H01Q 13/10 (2006.01); H01Q 1/28 (2006.01); H01Q 1/48 (2006.01); H01Q 5/307 (2015.01)
CPC H01Q 13/103 (2013.01) [H01Q 1/288 (2013.01); H01Q 1/48 (2013.01); H01Q 5/307 (2015.01); H01Q 13/106 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A frequency reconfigurable (FR) slot-based ultra-high frequency (UHF) antenna for use in cubic shaped satellites (Cube-Sat), comprising:
a dielectric circuit board having a surface dimension of about 100 mm in length and about 100 mm in width, a top side, a bottom side, a first edge opposite a second edge, and a third edge opposite a fourth edge;
a metallic layer configured to cover the top side of the dielectric circuit board;
a meandered slot line formed in the metallic layer, wherein the meandered slot line comprises a heptagonal path connected to and enclosing a rectangular path, wherein the meandered slot line is configured to have mirror image geometry about a central axis which extends from the first edge to the second edge, passes through an apex of the heptagonal path and bisects the rectangular path;
a feed horn to the first edge of the circuit board, wherein an open end of the feed horn is directed towards the apex of the heptagonal path;
a reverse biased varactor diode connected to the metallic layer across the rectangular path and parallel to the central axis;
a ground terminal connected to the metallic layer; and
a biasing circuit configured to bias the reverse biased varactor diode and cause the frequency reconfigurable (FR) slot-based ultra-high frequency (UHF) antenna to resonate in a frequency range of 300 MHz to 450 MHz.