# US 12,224,477 B2 · Multiple-input multiple-output antenna apparatus and heat dissipation device therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,477 B2 - Document ID: US12224477B2 - Status: Granted - Kind: B2 - Application number: 18/075,408 - Filed: 2022-12-05 - Published: 2023-03-30 - Granted: 2025-02-11 - Earliest claimed: 2020-06-08 - Assignees: Kmw Inc. - Applicants: Kmw Inc. - Inventors: Duk Yong Kim; Kyo Sung Ji; Chi Back Ryu; Kyu Chul Choi; Hye Yeon Kim; In Hwa Choi; Jae Ho Jang; Jae Hyun Park; Youn Jun Cho; Jeong Hyun Choi - Web page: https://patentgrep.com/patent/US12224477B2 ## CPC - H01Q 1/02: Arrangements for de-icing; Arrangements for drying-out {; Arrangements for cooling; Arrangements for preventing corrosion} - H04B 1/036: Cooling arrangements - H01Q 1/246: {specially adapted for base stations} - H01Q 1/42: Housings not intimately mechanically associated with radiating elements, e.g. radome - H01Q 21/28: Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} - H04B 7/0413: MIMO systems - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04B: TRANSMISSION ## Abstract A massive multiple-input multiple-output (MIMO) antenna apparatus and a heat dissipation device therefor are disclosed. The present disclosure according to at least one embodiment provides a massive MIMO antenna apparatus including a board, a first blowing unit, and a second blowing unit. The board has at least one board surface that holds a distributed arrangement of a plurality of heat-generating components, has a width and a length longer than the width, and includes a first section having a first amount of heat generation and a second section having a second amount of heat generation greater than the first amount of heat generation, the first section and the second section being partitioned along a length direction of the board. ## Claims ### Claim 1 A massive multiple-input multiple-output (MIMO) antenna apparatus, comprising: a board having at least one board surface that holds a distributed arrangement of a plurality of heat-generating components, that has a width and a length, wherein the length is longer than the width, and that includes a first section having a first amount of heat generation and a second section having a second amount of heat generation greater than the first amount of heat generation, the first section and the second section being partitioned along a length direction of the board; a first blowing unit disposed to overlap at least some of the first section and configured to cool at least some of heat generated from the first section, the first blowing unit comprising at least one or more first fans; and a second blowing unit disposed to overlap at least some of the second section and configured to cool at least some of heat generated from the second section, the second blowing unit comprising at least one or more second fans, wherein the second blowing unit is configured to discharge an airflow greater than an airflow that the first blowing unit is configured to discharge, wherein the airflow discharged from the first blowing unit is caused to cool the first section while caused to remain unmixed with the airflow discharged from the second blowing unit, and wherein the airflow discharged from the second blowing unit is caused to cool the second section while caused to remain unmixed with the airflow discharged from the first blowing unit. ### Claim 2 (depends on 1) The MIMO antenna apparatus of claim 1, wherein the at least one or more second fans of the second blowing unit are greater in number than the at least one or more first fans of the first blowing unit. ### Claim 3 (depends on 2) The MIMO antenna apparatus of claim 2, wherein the second blowing unit comprises the at least one or more second fans that are disposed along a width direction of the board. ### Claim 4 (depends on 1) The MIMO antenna apparatus of claim 1, further comprising: a control unit configured to adjust the airflow discharged from the first blowing unit and the airflow discharged from the second blowing unit. ### Claim 5 (depends on 4) The MIMO antenna apparatus of claim 4, wherein the control unit is configured to perform redundancy control for the first section and the second section. ### Claim 6 (depends on 4) The MIMO antenna apparatus of claim 4, configured to adjust at least one of a rotational speed of the first fan and a rotational speed of the second fan based on at least one of a temperature of the first section and a temperature of the second section. ### Claim 7 (depends on 4) The MIMO antenna apparatus of claim 4, wherein the control unit is configured to adjust the airflow discharged from the first blowing unit and the airflow discharged from the second blowing unit to maintain a temperature difference between the first section and the second section within a predetermined range. ### Claim 8 (depends on 7) The MIMO antenna apparatus of claim 7, wherein the temperature difference between the first section and the second section is configured to be maintained within 15 degrees Celsius by the control unit. ### Claim 9 (depends on 1) The MIMO antenna apparatus of claim 1, further comprising: a plurality of first cooling fins disposed between the first section and the first blowing unit; and a plurality of second cooling fins disposed between the second section and the second blowing unit. ### Claim 10 (depends on 9) The MIMO antenna apparatus of claim 9, wherein the first cooling fins and the second cooling fins extend along a width direction of the board. ### Claim 11 A massive multiple-input multiple-output (MIMO) antenna apparatus, comprising: a board having at least one board surface that holds a distributed arrangement of a plurality of heat-generating components, that has a width and a length, wherein the length is longer than the width, and that includes a first section having a first amount of heat generation and a second section having a second amount of heat generation greater than the first amount of heat generation, the first section and the second section being partitioned along a length direction of the board; a first blowing unit disposed to overlap at least some of the first section and configured to cool at least some of heat generated from the first section, the first blowing unit comprising at least one or more first fans; a second blowing unit disposed to overlap at least some of the second section and configured to cool at least some of heat generated from the second section, the second blowing unit comprising at least one or more second fans; and a control unit configured to adjust the airflow discharged from the first blowing unit and the airflow discharged from the second blowing unit, wherein the second blowing unit is configured to discharge an airflow greater than the airflow that the first blowing unit is configured to discharge, and wherein the control unit is configured to determine how many of the at least one or more first fans are to operate and how many of the at least one or more second fans are to operate based on at least one of a temperature of the first section and a temperature of the second section. ### Claim 12 (depends on 11) The MIMO antenna apparatus of claim 11, wherein the control unit is configured to adjust the airflow discharged from the first blowing unit and the airflow discharged from the second blowing unit to maintain a temperature difference between the first section and the second section within a predetermined range. ### Claim 13 (depends on 11) The MIMO antenna apparatus of claim 11, further comprising: a plurality of first cooling fins disposed between the first section and the first blowing unit; and a plurality of second cooling fins disposed between the second section and the second blowing unit. ### Claim 14 (depends on 13) The MIMO antenna apparatus of claim 13, wherein the first cooling fins and the second cooling fins extend along a width direction of the board. ### Claim 15 (depends on 11) The MIMO antenna apparatus of claim 11, wherein the first section includes a first heat-generating component group having a first average heat generation, and the second section includes a second heat-generating component group having a second average heat generation greater than the first average heat generation. ### Claim 16 (depends on 11) The MIMO antenna apparatus of claim 11, further comprising: a radome panel having at least a portion disposed to face the at least one board surface on which the plurality of heat-generating components are disposed, wherein the radome panel and the at least one board surface establish an intervening receiving space, and wherein the airflow discharged from the first blowing unit and the second blowing unit is caused to not flow into the receiving space. ### Claim 17 A massive multiple-input multiple-output (MIMO) antenna apparatus, comprising: a board having at least one board surface that holds a distributed arrangement of a plurality of heat-generating components, that has a width and a length, wherein the length is longer than the width, and that includes a first section having a first amount of heat generation and a second section having a second amount of heat generation greater than the first amount of heat generation, the first section and the second section being partitioned along a length direction of the board; a first blowing unit disposed to overlap at least some of the first section and configured to cool at least some of heat generated from the first section, the first blowing unit comprising at least one or more first fans; and a second blowing unit disposed to overlap at least some of the second section and configured to cool at least some of heat generated from the second section, the second blowing unit comprising at least one or more second fans, wherein the second blowing unit is configured to discharge an airflow greater than an airflow that the first blowing unit is configured to discharge, and wherein the first section has a first unit heat generation obtained by dividing the first amount of heat generation by an area of the first section, and the second section has a second unit heat generation obtained by dividing the second amount of heat generation by an area of the second section, the second unit heat generation being greater than the first unit heat generation. ### Claim 18 (depends on 1) The MIMO antenna apparatus of claim 1, wherein the first section includes a first heat-generating component group having a first average heat generation, and the second section includes a second heat-generating component group having a second average heat generation greater than the first average heat generation. ### Claim 19 (depends on 1) The MIMO antenna apparatus of claim 1, further comprising: a radome panel having at least a portion disposed to face the at least one board surface on which the plurality of heat-generating components are disposed, wherein the radome panel and the at least one board surface establish an intervening receiving space, and wherein the airflow discharged from the first blowing unit and the second blowing unit is caused to not flow into the receiving space. ### Claim 20 (depends on 17) The MIMO antenna apparatus of claim 17, wherein the first section includes a first heat-generating component group having a first average heat generation, and the second section includes a second heat-generating component group having a second average heat generation greater than the first average heat generation.