US 12,148,987 B2
Antenna module, communication device, and array antenna
Tomoshige Furuhi, Kyoto (JP); Saneaki Ariumi, Kyoto (JP); Hisao Hayafuji, Kyoto (JP); Tomoki Kato, Kyoto (JP); and Yasutaka Sugimoto, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed on Mar. 2, 2021, as Appl. No. 17/189,442.
Application 17/189,442 is a continuation of application No. PCT/JP2019/035606, filed on Sep. 11, 2019.
Claims priority of application No. 2018-182098 (JP), filed on Sep. 27, 2018.
Prior Publication US 2021/0184344 A1, Jun. 17, 2021
Int. Cl. H01Q 1/42 (2006.01); H01Q 1/22 (2006.01); H01Q 13/18 (2006.01); H01Q 21/06 (2006.01)
CPC H01Q 1/422 (2013.01) [H01Q 1/2283 (2013.01); H01Q 13/18 (2013.01); H01Q 21/065 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An antenna module comprising:
a dielectric substrate having a multilayer structure;
a first radiation electrode;
a ground electrode; and
a second radiation electrode arranged between the first radiation electrode and the ground electrode in a lamination direction of the dielectric substrate,
wherein a hollow portion is disposed in at least a portion between the first radiation electrode and the second radiation electrode in the dielectric substrate,
wherein a cavity portion extending from an upper surface of the dielectric substrate through the dielectric substrate to the hollow portion is disposed in the dielectric substrate.