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1. (WO2019067372) RADIO FREQUENCY SIGNAL BOOSTERS FOR HIGH FREQUENCY CELLULAR COMMUNICATIONS
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WHAT IS CLAIMED IS:

1. A signal booster system comprising:

a base station antenna configured to wirelessly receive an incoming downlink signal from one or more base stations of a cellular network;

a signal booster comprising:

booster circuitry configured to amplify the incoming downlink signal to generate a boosted downlink signal; and

a signal conversion circuit configured to convert the boosted downlink signal to an outgoing downlink signal of lower frequency; and a mobile station antenna configured to receive the outgoing downlink signal from the signal booster via a cable, and to wirelessly transmit the outgoing downlink signal to one or more mobile devices of the cellular network.

2. The signal booster system of claim 1, wherein the incoming downlink signal comprises a licensed cellular signal and the outgoing downlink signal comprises an unlicensed RF signal.

3. The signal booster system of claim 2, wherein the licensed cellular signal comprises a 5G signal.

4. The signal booster system of claim 2, wherein the unlicensed RF signal comprises a WiFi signal.

5. The signal booster system of claim 1, wherein the incoming downlink signal has a frequency greater than 6 GHz and the outgoing downlink signal has a frequency of less than 6 GHz.

6. The signal booster system of claim 5, wherein the incoming downlink signal comprises a millimeter wave signal.

7. The signal booster system of claim 1, wherein the signal conversion circuit is further configured to receive an incoming uplink signal from the mobile station antenna via the cable, and to convert the incoming uplink signal to an outgoing uplink signal of higher frequency.

8. The signal booster system of claim 7, wherein the incoming uplink signal comprises a licensed cellular signal and the outgoing uplink signal comprises an unlicensed RF signal.

9. The signal booster system of claim 8, wherein the licensed cellular signal comprises a 5G signal.

10. The signal booster system of claim 8, wherein the unlicensed RF signal comprises a WiFi signal.

11. The signal booster system of claim 7, wherein the outgoing uplink signal has a frequency greater than 6 GHz and the incoming uplink signal has a frequency of less than 6 GHz.

12. The signal booster system of claim 1, wherein the signal booster further comprises a housing enclosing the booster circuitry and the signal conversion circuit.

13. The signal booster system of claim 12, wherein the base station antenna is within the housing.

14. The signal booster system of claim 12, wherein the base station antenna extends from the housing.

15. The signal booster system of claim 12, further comprising a circuit board on which the booster circuitry and the signal conversion circuit reside.

16. The signal booster system of claim 15, further comprising an RF shield between the circuit board and the base station antenna.

17. The signal booster system of claim 1, wherein the mobile station antenna is integrated in a unit.

18. The signal booster system of claim 17, wherein the cable comprises a shared DC power and RF cable coupled between the unit and the signal booster.

19. The signal booster system of claim 18, wherein the unit comprises a DC/RF combiner circuit configured to provide power to the signal booster via the shared DC power and RF cable.

20. The signal booster system of claim 18, wherein the shared DC power and RF cable includes a conductor configured to carry an RF voltage superimposed on a DC supply voltage, the signal booster further comprising a DC/RF separator configured to extract the DC supply voltage from the conductor.

21. The signal booster system of claim 17, wherein the mobile station antenna is within a housing of the unit.

22. The signal booster system of claim 17, wherein the mobile station antenna extends from a housing of the unit.

23. The signal booster system of claim 17, wherein the unit is configured to charge a mobile device.

24. The signal booster system of claim 17, wherein the unit is configured to display at least one of a status or a temperature of the signal booster.

25. The signal booster system of claim 24, wherein the unit is configured to display a temperature alarm in response to a temperature detector of the signal booster detecting a high temperature condition.

26. The signal booster system of claim 24, wherein the unit comprises at least one of an indicator light or a display.

27. The signal booster system of claim 17, wherein the unit comprises a booster control interface configured to control the signal booster.

28. The signal booster system of claim 1, wherein the signal booster comprises at least one of an umbrella, a heat sink, a fan, a shell coating, a sun visor, or a solar reflector for providing protection from overheating.

29. The signal booster system of claim 1, wherein the signal booster comprises a temperature detector.

30. The signal booster system of claim 29, wherein the signal booster is configured to operate with backed-off gain in response to the temperature detector detecting a high temperature condition.

31. The signal booster system of claim 1, wherein the base station antenna comprises a beamforming antenna array.

32. The signal booster system of claim 1, wherein the base station antenna comprises a directional antenna.

33. The signal booster system of claim 1, wherein the base station antenna is integrated with the signal booster.

34. The signal booster system of claim 33, wherein the signal booster further comprises an external base station antenna detector configured to detect when an external base station antenna is present.

35. The signal booster system of claim 34, wherein the signal booster is configured to disable the base station antenna in favor of the communicating using the external base station antenna in response to the external antenna detector detecting presence of the external base station antenna.

36. The signal booster system of claim 34, wherein the signal booster is configured to detect and limit an output power of the external base station antenna based on at least one emissions specification.

37. The signal booster system of claim 1, installed in a building with the base station antenna outside of the building and the mobile station antenna inside of the building.

38. A signal booster system comprising:

a base station antenna configured to wirelessly receive an incoming downlink signal from one or more base stations of a cellular network;

a signal booster comprising:

booster circuitry configured to amplify the incoming downlink signal to generate a boosted downlink signal; and

a first signal conversion circuit configured to process the boosted downlink signal to generate a converted downlink signal of lower frequency; a unit configured to receive the converted downlink signal from the signal booster via a cable, wherein the unit comprises a second signal conversion circuit configured to process the converted downlink signal to generate an outgoing downlink signal of higher frequency; and

a mobile station antenna configured to wirelessly transmit the outgoing downlink signal to one or more mobile devices of the cellular network.

39. The signal booster system of claim 38, wherein the incoming downlink signal comprises a 5G signal.

40. The signal booster system of claim 38, wherein the incoming downlink signal comprises a millimeter wave signal.

41. The signal booster system of claim 38, wherein the incoming downlink signal has a frequency greater than 6 GHz and the converted downlink signal has a frequency of less than 6 GHz.

42. The signal booster system of claim 38, wherein the first signal conversion circuit comprises a downlink frequency downconversion circuit and the second signal conversion circuit comprises a downlink frequency upconversion circuit.

43. The signal booster system of claim 42, wherein the downlink frequency downconversion circuit and the downlink frequency upconversion circuit provide substantially equal amounts of frequency shifting.

44. The signal booster system of claim 38, wherein the second signal conversion circuit is further configured to process an incoming uplink signal from the mobile station antenna to generate a converted uplink signal of lower frequency, and wherein the first signal conversion circuit is further configured to process the converted uplink signal to generate an outgoing uplink signal of higher frequency.

45. The signal booster system of claim 44, wherein the incoming uplink signal comprises a 5G signal.

46. The signal booster system of claim 44, wherein the incoming uplink signal comprises a millimeter wave signal.

47. The signal booster system of claim 44, wherein the incoming uplink signal has a frequency greater than 6 GHz and the converted uplink signal has a frequency of less than 6 GHz.

48. The signal booster system of claim 44, wherein the second signal conversion circuit comprises an uplink frequency downconversion circuit and the first signal conversion circuit comprises an uplink frequency upconversion circuit.

49. The signal booster system of claim 48, wherein the uplink frequency downconversion circuit and the uplink frequency upconversion circuit provide substantially equal amounts of frequency shifting.

50. The signal booster system of claim 38, wherein the signal booster further comprises a housing enclosing the booster circuitry and the first signal conversion circuit.

51. The signal booster system of claim 50, wherein the outdoor base station antenna is within the housing.

52. The signal booster system of claim 50, wherein the outdoor base station antenna extends from the housing.

53. The signal booster system of claim 50, further comprising a circuit board on which the booster circuitry and the first signal conversion circuit reside.

54. The signal booster system of claim 53, further comprising an RF shield between the circuit board and the outdoor base station antenna.

55. The signal booster system of claim 38, wherein the mobile station antenna is within a housing of the unit.

56. The signal booster system of claim 38, wherein the mobile station antenna extends from the housing of the unit.

57. The signal booster system of claim 38, wherein the cable comprises a shared DC power and RF cable coupled between the unit and the signal booster.

58. The signal booster system of claim 57, wherein the unit comprises a DC/RF combiner circuit configured to provide power to the signal booster via the shared DC power and RF cable.

59. The signal booster system of claim 57, wherein the shared DC power and RF cable includes a conductor configured to carry an RF voltage superimposed on a DC supply voltage, the signal booster further comprising a DC/RF separator configured to extract the DC supply voltage from the conductor.

60. The signal booster system of claim 38, wherein the unit is configured to charge a mobile device.

61. The signal booster system of claim 38, wherein the unit is configured to display at least one of a status or a temperature of the signal booster.

62. The signal booster system of claim 61, wherein the unit is configured to display a temperature alarm in response to a temperature detector of the signal booster detecting a high temperature condition.

63. The signal booster system of claim 61, wherein the unit comprises at least one of an indicator light or a display.

64. The signal booster system of claim 38, wherein the unit comprises a booster control interface configured to control the signal booster.

65. The signal booster system of claim 38, wherein the signal booster comprises at least one of an umbrella, a heat sink, a fan, a shell coating, a sun visor, or a solar reflector for providing protection from overheating.

66. The signal booster system of claim 38, wherein the signal booster comprises a temperature detector.

67. The signal booster system of claim 66, wherein the signal booster is configured to operate with backed-off gain when the temperature detector detects a high temperature condition.

68. The signal booster system of claim 38, wherein the base station antenna comprises a beamforming antenna array.

69. The signal booster system of claim 38, wherein the base station antenna comprises a directional antenna.

70. The signal booster system of claim 38, wherein the base station antenna is integrated with the signal booster.

71. The signal booster system of claim 70, wherein the signal booster further comprises an external base station antenna detector configured to detect when an external base station antenna is present.

72. The signal booster system of claim 71, wherein the signal booster is configured to disable the base station antenna in favor of the communicating using the external base station antenna in response to the external antenna detector detecting presence of the external base station antenna.

73. The signal booster system of claim 72, wherein the signal booster is configured to detect and limit an output power of the external base station antenna based on at least one emissions specification.

74. The signal booster system of claim 38, wherein the incoming downlink signal and the outgoing downlink signal are of substantially equal frequency.

75. The signal booster system of claim 38, wherein the incoming downlink signal and the outgoing downlink signal each comprise a 5G signal.

76. The signal booster system of claim 38, wherein the incoming downlink signal and the outgoing downlink signal each comprise a millimeter wave signal.

77. The signal booster system of claim 38, installed in a building with the base station antenna outside of the building and the mobile station antenna inside of the building.