US 12,032,052 B2
Emergency rescue equipment comprising a harmonic reflector circuit
Magnus Granhed, Lidingö (SE); and Tomas Forssén, Västerås (SE)
Assigned to Recco Invest AB, Lidingö (SE)
Appl. No. 17/414,699
Filed by Recco Invest AB, Lidingö (SE)
PCT Filed Dec. 17, 2019, PCT No. PCT/SE2019/051288
§ 371(c)(1), (2) Date Jun. 16, 2021,
PCT Pub. No. WO2020/130913, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 1851646-8 (SE), filed on Dec. 21, 2018.
Prior Publication US 2022/0075046 A1, Mar. 10, 2022
Int. Cl. G01S 13/34 (2006.01); G01S 13/75 (2006.01); G08B 25/01 (2006.01); H01Q 1/24 (2006.01); H01Q 1/27 (2006.01)
CPC G01S 13/34 (2013.01) [G01S 13/753 (2013.01); G08B 25/016 (2013.01); H01Q 1/241 (2013.01); H01Q 1/273 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An emergency rescue equipment comprising:
a harmonic reflector circuit having an antenna connected to non-linear circuit via a matching circuit; and
a casing that in full or in part encloses the harmonic reflector circuit;
wherein the harmonic reflector circuit is configured to receive a received signal at a receive frequency (fRX), and configured to re-transmit the received signal at a transmit frequency (fTX);
wherein the transmit frequency is a multiple of the receive frequency;
wherein the receive frequency (fRX) is in an interval from a first frequency to a second frequency, where:
the first frequency is at least 800 MHz and within the radio-frequency range;
the second frequency is at least 34 MHz higher than the first frequency and within the radio-frequency range; and
the received signal is re-transmitted at the transmit frequency (fTX) with an output power (Pout) of 70%-100% of a maximum available output power (Pmax).