Enclosed wireless telecommunications antenna

• US 5,880,701 A
• Filed: 06/25/1996
• Issued: 03/09/1999
• Est. Priority Date: 06/25/1996
• Status: Expired due to Fees

• Current Assignee: Teletek, LLC
• Original Assignee: PCS Solutions LLC
• Inventors: Bhame, William H., Rustom, Bassem, Dick, Robert L. IV
• Primary Examiner(s): Hajec, Donald T.
• Assistant Examiner(s): Phan, Tho
• Application Number:
  US08/670,410
• Time in Patent Office: 987 Days
• Field of Search: 343/765, 343/763, 343/766, 343/890, 343/891, 343/892, 343/893
• US Class Current: 343/890
• CPC Class Codes: H01Q 1/1207 for fastening a rigid aerial element
• CPC Class Codes: H01Q 1/1242 Rigid masts specially adapted for supporting an aerial

Abstract

The present invention relates to an antenna module for installation on a wireless telecommunications tower at a transceiver site. The antenna module comprises a frame adapted to be installed on the upper end of the tower, containing a means for mounting, and adjusting the alignment of, one or more panel antennas for optimal signal transmission and reception. A radio frequency energy transparent cover surrounds the antenna module, extending height-wise of the frame, enclosing it, the mounting means, and the panel antennas mounted thereon, thereby reducing wind loading on the antenna module.

Claims

1. An antenna module for installation on a wireless telecommunications tower, said antenna module comprising:

(a) a frame adapted to be installed on the upper end of said tower, substantially coaxial with the longitudinal axis of said tower, said frame having means for coaxially mounting one or more panel antennas in a generally vertical position for the transmission and reception of wireless telecommunication signals, said mounting means including a means for adjusting the alignment of mounted panel antennas for optimal reception and transmission of said signals; and

(b) a radio frequency energy transparent cover secured to said frame, said cover extending height-wise of said frame, enclosing said frame, said mounting means, and said panel antennas mounted thereon, so as to reduce wind loading on said antenna module.

2. An antenna module as set forth in claim 1 wherein said adjusting means includes a means for adjusting the angular positioning of said panel antennas relative to said tower about said longitudinal axis of said tower.

3. An antenna module as set forth in claim 2 wherein said adjusting means further includes a means for adjusting the angular positioning of one of said panel antenna relative to another of said panel antennas.

4. An antenna module as set forth in claim 1 where said adjusting means includes a means for adjusting the inclination of said panel antennas relative to the horizon for downtilt or uptilt.

5. An antenna module as set forth in claim 1 wherein said radio frequency energy transparent cover is generally of cylindrical shape, said cover having a cross sectional area ranging between 0.5-2.5 times the cross sectional area of the upper end of said tower on which the antenna module is installed.

6. An antenna module as set forth in claim 5 wherein the cross section of said radio frequency energy transparent cover is approximately the same as the cross section of the upper end of said tower on which the antenna module is installed, such that said antenna module visually appears to be an extension of said tower.

7. An antenna module as set forth in claim 5 wherein the cross section of said radio frequency energy transparent cover is shaped to minimize wind loading on said antenna module.

8. An antenna module as set forth in claim 1 comprising a first antenna module secured to the upper end of said tower and having at least one additional antenna module secured on the top of said first antenna module.

9. An antenna module as set forth in claim 8 having radio-frequency transmitting cables connected to said panel antennas, and wherein said frame of said first antenna module has means therewithin for routing a sufficient number of said cables therethrough so as to service said panel antennas included in said first antenna module and in each of said at least one additional antenna module mounted thereon.

10. An antenna module as set forth in claim 1 wherein radio frequency energy absorbing material is installed internally on said frame so as to improve performance of said panel antennas by absorbing and containing undesired radio frequency energy.

11. An antenna module as set forth in claim 1 wherein said frame includes means on its lower end for attachment of said frame to the upper end of said tower.

12. An antenna module as set forth in claim 11 wherein said frame includes means on its upper end for the attachment of a second antenna module vertically stacked thereon.

13. An antenna module as set forth in claim 1 having three of said antenna panels mounted on said frame and spaced about a vertical axis of said frame at substantially equal angular intervals, said cover having an inner diameter sufficient to enclose said antenna panels such that said antenna panels are in closely spaced proximity to one another within said cover so as to minimize back and side lobe radio-frequency interference emissions.

14. An antenna module for installation on a wireless telecommunications tower, said antenna module comprising:

(a) a frame having a inner member, a means on the lower end of said inner member for installation on the upper end of said tower, and a means on the upper end of said frame for the attachment of a second antenna module vertically stacked thereon;

(b) an outer member carried by said inner member between said upper and lower attachment means, said outer member being generally concentric with respect to said inner member, and having means for mounting one or more panel antennas in a generally vertical position for the transmission and reception of signals, said outer member being adjustably rotatable through at least a limited range of concentric rotation relative to said inner members, thereby allowing said panel antennas secured thereto to be positioned in a desired angular position relative to the vertical axis of said tower, said antenna mounting means including a means for adjusting the alignment of mounted panel antennas for optimal signal reception and transmission; and

(c) a radio frequency energy transparent cover extending height-wise of said frame, enclosing said frame, inner and outer members, and panel antennas mounted thereon so as to reduce wind loading on said antenna module.

15. An antenna module as set forth in claim 14 wherein said inner member is structures so as to carry substantially all of the structural load of said second antenna module.

16. An antenna module as set forth in claim 14 wherein said outer member includes a means for adjusting the angular position of one of said panel antennas relative to another of said panel antennas.

17. An antenna module as set forth in claim 14 wherein said outer member includes a means for adjusting the vertical inclination of said panel antennas relative to the horizon.

18. An antenna module as set forth in claim 14 wherein said cylindrical inner member has one or more openings to permit cables within said inner member to be passed through said inner member for connection to said panel antennas secured to said outer member.

19. An antenna module as set forth in claim 14 wherein radio frequency energy absorbing material is secured to the inner surface of said cylindrical inner member to contain and absorb undesired side and back lobe radio energy emissions from said panel antennas.

20. A stacked modular antenna system for a cellular or personal communications system tower for mounting one or more antenna modules in a vertically stacked configuration on the upper end of said tower such that said antenna modules appear to be an extension of said tower, each of said antenna modules comprising:

(a) an internal frame, said frame having an upper and lower mount, said lower mount being adapted to be secured to the upper end of said tower coaxial with the longitudinal axis of said tower if said antenna module is the lowermost of said vertically stacked configuration, and being adapted to be secured to the upper mount of the next lower vertically adjacent antenna module if said antenna module is not the lowermost antenna module in said vertically stacked configuration;

(b) one or more panel antennas carried concentrically by said frame between said upper and lower mounts, each of said panel antennas adapted for the transmission and reception of cellular communications signals;

(c) means for adjusting the position of each of said panel antennas relative to the longitudinal axis of said tower and relative to said other panel antennas carried by said frame so as to align said panel antenna to a predetermined compass direction and elevation; and

(d) a cover of radio frequency energy transparent material secured to said frame, said cover enclosing said frame and said panel antennas.

21. A stacked modular antenna system as set forth in claim 20 in which said vertically stacked configuration includes said lowermost antenna module, an uppermost antenna module, and one or more intermediate antenna modules with said lowermost antenna module having its lower mount secured to the upper end of said tower, a vertically adjacent intermediate antenna module having its lower mount secured to the upper mount of the said lowermost antenna module, and with said uppermost antenna module having its lower mount secured to the upper mount of the intermediate antenna module adjacent therebelow.

22. A stacked modular antenna system as set forth in claim 21 wherein radio frequency energy absorbing material is secured to the interior of said internal frame in one or more of said antenna modules in said vertically stacked configuration, said material configured to absorb side and back lobe energy emissions from said panel antennas.