# US 2025/0167458 A1 · Array antenna device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0167458 A1 - Document ID: US20250167458A1 - Status: Published application - Kind: A1 - Application number: 18/841,290 - Filed: 2023-02-17 - Published: 2025-05-22 - Earliest claimed: 2022-02-24 - Assignees: Hiroshima University - Applicants: Hiroshima University - Inventors: Minoru FUJISHIMA - Web page: https://patentgrep.com/patent/US20250167458A1 ## CPC - H01Q 21/065: {Patch antenna array} - H01Q 3/42: using frequency-mixing {(H01Q3/2676 takes precedence)} - H03D 7/165: {at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature (combined with amplitude demodulation H03D1/2245, combined with angle demodulation H03D3/007; N-path filters H03H19/002)} - H04B 1/40: Circuits - H04B 7/0617: {for beam forming} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H03D: DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER (masers, lasers H01S; circuits capable of acting both as modulator and demodulator H03C; details applicable to both modulators and frequency-changers H03C; demodulating pulses H03K9/00; transforming types of pulse modulation H03K11/00; coding, decoding or code conversion, in general H03M; repeater stations H04B7/14; demodulators adapted for AC systems of digital information transmission H04L27/00; synchronous demodulators adapted for colour television H04N9/66) - H04B: TRANSMISSION ## Abstract An array antenna device for use in a 300 GHz band includes a first layer in which antenna elements are arranged in a grid shape and a second layer stacked on the first layer. The second layer includes mixers that are arranged in grid regions overlapping the antenna elements in plan view, that each include an LO signal terminal, an IF signal terminal, and an RF signal terminal, with the RF signal terminals being electrically connected to the antenna elements. The second layer also includes LO signal lines provided to respective columns of the mixers. Each LO signal line is commonly connected to the LO signal terminal of the mixers of the same column. The second layer further includes IF signal lines provided to respective rows of the mixers. Each IF signal line is commonly connected to the IF signal terminal of the mixer of the same row. ## Claims ### Claim 1 An array antenna device, comprising: a first layer in which a plurality of antenna elements is arranged in a grid pattern; and a second layer stacked on the first layer, wherein the second layer includes: a plurality of mixers disposed in a plurality of grid areas overlapping with the plurality of antenna elements in plan view, each mixer including an LO signal terminal, an IF signal terminal, and an RF signal terminal, the RF signal terminals being electrically connected to the plurality of antenna elements, a plurality of LO signal lines provided for each column of the plurality of mixers, the LO signal terminals of the mixers in a same column being commonly connected to the LO signal lines, and a plurality of IF signal lines provided for each row of the plurality of mixers, the IF signal terminals of the mixers in a same row being commonly connected to the IF signal lines. ### Claim 2 (depends on 1) The array antenna device according to claim 1, wherein the second layer includes a plurality of phase shifters connected to at least one of the plurality of LO signal lines and the plurality of IF signal lines, and the plurality of phase shifters is disposed outside the plurality of grid areas. ### Claim 3 (depends on 2) The array antenna device according to claim 2, wherein the second layer includes a controller that controls signal phase adjustment by the phase shifters, and the controller is disposed outside the plurality of grid areas. ### Claim 4 (depends on 2) The array antenna device according to claim 2, wherein the plurality of phase shifters is connected in series. ### Claim 5 (depends on 4) The array antenna device according to claim 4, wherein the plurality of phase shifters is arranged at a same pitch as the plurality of mixers. ### Claim 6 (depends on 1) The array antenna device according to claim 1, wherein the plurality of LO signal lines is arranged in parallel at equal intervals. ### Claim 7 (depends on 1) The array antenna device according to claim 1, wherein the plurality of IF signal lines is arranged in parallel at equal intervals. ### Claim 8 (depends on 1) The array antenna device according to claim 1, wherein the first layer is a printed circuit board, and the second layer is a semiconductor substrate. ### Claim 9 (depends on 8) The array antenna device according to claim 8, wherein the semiconductor substrate is a compound semiconductor substrate or BiCMOS, and amplifiers are provided between the antenna elements and the mixers, the amplifiers being disposed in the grid regions. ### Claim 10 (depends on 8) The array antenna device according to claim 8, wherein the array antenna device is a transceiver integrated device. ### Claim 11 (depends on 10) The array antenna device according to claim 10, wherein the semiconductor substrate is a compound semiconductor substrate or BiCMOS, and amplifiers are provided between the antenna elements and the mixers, the amplifiers being disposed in the grid regions. ### Claim 12 (depends on 1) The array antenna device according to claim 1, wherein: the first layer is a printed circuit board, the second layer is a photo-electronic substrate, the mixers are Uni-Travelling Carrier Photodiodes, and signals connected to the LO signal lines and the IF signal lines are optical signals.