Apparatus and methods for radio frequency signal boosters

• US 9,775,051 B2
• Filed: 12/29/2015
• Issued: 09/26/2017
• Est. Priority Date: 01/02/2015
• Status: Active Grant

• Current Assignee: Cellphone-Mate
• Original Assignee: Cellphone-Mate
• Inventors: Zhan, Hongtao
• Primary Examiner(s): Urban, Edward
• Assistant Examiner(s): Justus, Ralph H
• Application Number:
  US14/982,754
• Publication Number:
  US 20160198347A1
• Time in Patent Office: 637 Days
• Field of Search: 455 7, 455 15, 455 111, 455 134
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04B 7/15528 Control of operation parameters of a relay station to exploit the physical medium
• CPC Class Codes: H04B 7/15564 Relay station antennae loop interference reduction
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

Radio frequency (RF) signal boosters are provided. A radio frequency signal booster can include a housing integrated with a base station antenna. The booster includes a mobile station antenna port, and downlink and uplink amplifiers within the housing. The base station antenna can receive wireless communications signals on one or more downlink channels and transmit wireless communications signals on one or more uplink channels. Also, the mobile station antenna port can be connected to an integrated or separate mobile station antenna, which can provide communications signals on one or more downlink channels and receive wireless communications on one or more uplink channels. An isolator in the form of a reflector integrated with the housing can isolate the mobile station antenna from the base station antenna.

Claims

1. A radio frequency signal booster comprising:

a housing;

a first base station antenna located within the housing, the first base station antenna configured as a directional antenna to receive wireless communications signals on one or more downlink channels and to transmit wireless communications signals on one or more uplink channels;

a mobile station antenna port;

an omnidirectional mobile station antenna configured to connect to the mobile station antenna port via a radio frequency (RF) cable, for transmission of communications signals on one or more downlink channels and to receive wireless communications signals on one or more uplink channels;

a reflector integrated with the housing and configured to isolate the first base station antenna from the omnidirectional mobile station antenna;

a downlink amplifier within the housing, the downlink amplifier configured to amplify signals on downlink channels, received at the first base station antenna, for transmission through the mobile station antenna port; and

an uplink amplifier within the housing, the uplink amplifier configured to amplify signals on uplink channels, received at the mobile station antenna port, for transmission through the first base station antenna.

2. The radio frequency signal booster of claim 1, wherein the reflector is housed within the housing.

3. The radio frequency signal booster of claim 2, wherein the reflector extends beyond the housing.

4. The radio frequency signal booster of claim 2, wherein the reflector comprises a flat reflector surface.

5. The radio frequency signal booster of claim 2, wherein the reflector comprises a reflector having perforations.

6. The radio frequency signal booster of claim 5, wherein the perforations are configured to pass visible light and to inhibit passage of a highest frequency signal communicated by the signal booster.

7. The radio frequency signal booster of claim 2, wherein the reflector serves as a heat sink for electronics within the housing.

8. The radio frequency signal booster of claim 2, further comprising a heat sink between the reflector and electronics within the housing.

9. The radio frequency signal booster of claim 1, wherein the reflector comprises an RF shield having a first side and a second side opposite the first side, wherein the uplink and downlink amplifiers are positioned on the first side of the RF shield, and the first base station antenna is positioned on the second side of the RF shield.

10. The radio frequency signal booster of claim 9, wherein the RF shield is configured to reflect signals radiated from the directional antenna.

11. The radio frequency signal booster of claim 1, further comprising a second base station antenna, wherein the first base station antenna is configured to transmit and receive signals only of frequencies greater than a threshold frequency and the second base station antenna is configured to transmit and receive signals only of frequencies less than or equal to the threshold frequency.

12. The radio frequency signal booster of claim 1, further comprising a mounting bracket connected to a side of the housing.

13. The radio frequency signal booster of claim 1, further comprising a low-gain antenna port configured to provide and receive the same signals as the mobile station antenna port with a lower gain than the mobile antenna station port.

14. The radio frequency signal booster of claim 1, further comprising a signal processor configured to perform digital interference cancellation only for signals below a threshold frequency, the threshold frequency being less than a frequency of at least one uplink or downlink channel.

15. The radio frequency signal booster of claim 1, further comprising a router.

16. The radio frequency signal booster of claim 15, wherein the router comprises a WiFi router configured to access cellular data from a Universal Serial Bus (USB) dongle.

17. The radio frequency signal booster of claim 15, wherein the router comprises a WiFi router configured to access network data from a cable.

18. The radio frequency signal booster of claim 15, wherein the router comprises a cellular data router configured to receive cellular data via the first base station antenna and to provide a WiFi signal via the mobile station antenna port.

19. The radio frequency signal booster of claim 1, wherein the radio frequency signal booster further comprises:

a circular and concave outer mesh configured to reduce feedback between the first base station antenna and the mobile station antenna port; and

at least one light-emitting diode configured to indicate a system state.

20. The radio frequency signal booster of claim 19, further comprising a base stand.

21. The radio frequency signal booster of claim 20, wherein the system state includes at least one of:

a power-good state indicative of whether or not power is sufficient for operation, a signal-strength state indicative of whether or not an external signal has sufficient strength for reception, and an antenna-position state indicative of whether or not a distance between the omnidirectional mobile station antenna connected to the mobile station antenna port and the first base station antenna is sufficient.

22. The radio frequency signal booster of claim 1, further comprising a gain control circuit configured to automatically adjust a gain of the downlink amplifier and/or the uplink amplifier according to a distance between the omnidirectional mobile station antenna connected to the mobile station antenna port and the signal booster.

23. The radio frequency signal booster of claim 1, wherein the base station antenna is integrated on a printed circuit board, wherein the printed circuit board is spaced apart from a portion of the reflector to define a resonant cavity.

24. The radio frequency signal booster of claim 1, further comprising an interference cancellation system (ICS) within the housing and configured to provide signal processing to cancel feedback between the first base station antenna and the omnidirectional mobile station antenna.

25. The radio frequency signal booster of claim 24, wherein the ICS is configured to cancel feedback of one or more low frequency signal bands, and the reflector is configured to cancel feedback for one or more high frequency signal bands.

26. The radio frequency signal booster of claim 24, wherein the ICS is configured to cancel feedback for low frequency signals below 1 GHz, and the reflector is configured to cancel feedback for high frequency signals above 1 GHz.

27. A radio frequency signal booster comprising:

a housing;

a base station antenna located within the housing, the base station antenna configured to receive wireless communications signals on one or more downlink channels and to transmit wireless communications signals on one or more uplink channels;

an omnidirectional mobile station antenna separated from the housing via an RF cable configured to transmit communications signals on one or more downlink channels and to receive wireless communications signals on one or more uplink channels;

a reflector integrated with the housing and configured to isolate the base station antenna from the omnidirectional mobile station antenna;

a downlink amplifier within the housing, the downlink amplifier configured to amplify signals on downlink channels, received at the base station antenna, for transmission through the omnidirectional mobile station antenna; and

an uplink amplifier within the housing, the uplink amplifier configured to amplify signals on uplink channels, received at the omnidirectional mobile station antenna, for transmission through the base station antenna.

28. The radio frequency signal booster of claim 27, further comprising a gain control circuit configured to automatically adjust a gain of the downlink amplifier and/or the uplink amplifier according to a distance between the omnidirectional mobile station antenna and the signal booster.

29. The radio frequency signal booster of claim 27, wherein the reflector is configured to at least partially isolate the omnidirectional mobile station antenna from the base station antenna.

30. The radio frequency signal booster of claim 29, wherein the reflector is connected to and extends beyond the housing.

31. The radio frequency signal booster of claim 27, wherein the reflector extends beyond the base station antenna.

32. The radio frequency signal booster of claim 27, wherein the reflector comprises an RF shield having a first side and a second side opposite the first side, wherein the uplink and downlink amplifiers are positioned on the first side of the RF shield, and the first base station antenna is positioned on the second side of the RF shield.