US 12,422,513 B2
Method and apparatus for the directive direction finding
Kang Hee Kim, Daejeon (KR); Byung Chan Kim, Daejeon (KR); Haeng Sook Ro, Daejeon (KR); Gwang Moon Park, Daejeon (KR); Soo Ho Sohn, Daejeon (KR); and Ki Cheol Tae, Daejeon (KR)
Assigned to Electronics and Telecommunications Research Institute, Daejeon (KR)
Filed by ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed on Mar. 10, 2022, as Appl. No. 17/691,593.
Claims priority of application No. 10-2021-0021428 (KR), filed on Feb. 17, 2021; and application No. 10-2022-0012137 (KR), filed on Jan. 27, 2022.
Prior Publication US 2022/0381867 A1, Dec. 1, 2022
Int. Cl. G01S 3/42 (2006.01); G01S 3/04 (2006.01); G01S 3/74 (2006.01)
CPC G01S 3/42 (2013.01) [G01S 3/043 (2013.01); G01S 3/74 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A directive direction finding apparatus, comprising:
a directivity-enabled antenna array including a plurality of directional antennas, each having directivity in a same direction, the directivity-enabled antenna array being configured to spatially limit signal sources incident from the same direction in order to reduce interference and to enable direction finding with a relatively small number of receiver channels;
an RF/IF receiver connected to the directivity-enabled antenna array;
a digital receiver connected to the RF/IF receiver;
a direction finder connected to the digital receiver;
a directivity control unit configured to control an operation of the directivity-enabled antenna array; and
a transport/control interface connected to the direction finder and to manage control and operation of the directivity-enabled antenna array, the RF/IF receiver, the digital receiver, the direction finder and the directivity control unit,
wherein the directivity control unit includes a first buffer distributor disposed between a plurality of subarrays and a plurality of receivers, the first buffer distributor being connected to a plurality of single antennas and configured to convert analog signals to digital signals.