PCS cell site system for allowing a plurality of PCS providers to share cell site antennas

• US 5,781,865 A
• Filed: 05/20/1996
• Issued: 07/14/1998
• Est. Priority Date: 05/20/1996
• Status: Expired due to Term

• Current Assignee: Scientific Research Corporation
• Original Assignee: Scientific Research Corporation
• Inventors: Gammon, R. Keith
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): Nguyen, Lee
• Application Number:
  US08/650,618
• Time in Patent Office: 785 Days
• Field of Search: 455/103, 455/102, 455/132, 455/140, 455/82, 455/272, 455/273, 455/115, 455/443, 455/561, 455/562, 370/343, 370/344, 370/480, 370/488, 333/132, 333/101, 333/129
• US Class Current: 455/561
• CPC Class Codes: H01Q 21/0025 Modular arrays
• CPC Class Codes: H01Q 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• CPC Class Codes: H04W 16/24 Cell structures
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A new system for allowing PCS Providers to share cell sites, and more particularly multi-sector antennas, is provided. The present invention utilizes primarily passive, linear components to combine the transmit signals of PCS Providers which reside in non-adjacent frequency bands over a multi-sector antenna and to distribute from a multi-sector antenna the receive signals in all frequency bands of the PCS Providers.

Claims

1. A transceiver system for allowing the communication of a plurality of frequency bands at a Personal Communication Services (PCS) cell site, said transceiver system comprising:

(a) a transmitter system comprising;

(i) a first transmitter adapted to transmit signals in a first transmit frequency band;

(ii) a second transmitter adapted to transmit signals in a second transmit frequency band which is non-adjacent to said first transmit frequency band;

(iii) a first transmitter network coupled to said first and second transmitters, wherein said transmitter network is adapted to filter said first and second non-adjacent transmit frequency bands; and

(iv) a second transmitter network coupled to said first and second transmitters, wherein said second transmitter network is adapted to filter said first and second non-adjacent transmit frequency bands;

(b) a receiver system comprising;

(i) a first receiver adapted to receive signals in a first receive frequency band;

(ii) a second receiver adapted to receive signals in a second receive frequency band;

(iii) a first receiver network coupled to said first and second receivers, wherein said receiver network is adapted to pass said first and second receive frequency bands to said first and second receivers; and

(iv) a second receiver network coupled to said first and second receivers, wherein said second receiver network is adapted to pass said first and second receive frequency bands to said first and second receivers;

(c) a first transmit/receive antenna coupled to said first transmitter network and said first receiver network, wherein said first transmit/receive antenna is adapted to transmit said first and second non-adjacent transmit frequency bands in a particular direction at a certain beamwidth and receive said first and second receive frequency bands from the same particular direction and beamwidth; and

(d) a second transmit/receive antenna coupled to said second transmitter and receiver networks, wherein said second transmit/receive antenna is adapted to transmit said first and second non-adjacent transmit frequency bands and receive said first and second receive frequency bands in a direction different than that of said first transmit/receive antenna.

2. The transceiver system of claim 1, wherein said first transmitter network includes a first bandpass filter for filtering signals in said first frequency band and a second bandpass filter for filtering signals in said second frequency band.

3. The transceiver system of claim 1, wherein said first transmitter network is adapted to filter signals in said first and second non-adjacent frequency bands selected from the group consisting of:

1930-1945 MHz, 1945-1950 MHz, 1950-1965 MHz, 1965-1970 MHz, 1970-1975 MHz and 1975-1990 MHz; and

wherein said first receiver network is adapted to filter signals in said first and second frequency bands selected from the group consisting of;

1850-1865 MHz, 1865-1870 MHz, 1870-1885 MHz, 1885-1890 MHz, 1890-1895 MHz and 1895-1910 MHz.

4. The transceiver system of claim 1, wherein said first antenna is adapted to transmit and receive said first and second non-adjacent frequency bands in the particular direction with a certain beamwidth selected from the group consisting of:

32 degrees, 65 degrees, 90 degrees, 105 degrees and 120 degrees.

5. A transmitter system for allowing the transmission of a plurality of frequency bands at a PCS cell site, said transmitter system comprising:

(a) a first transmitter adapted to transmit signals in a first frequency band;

(b) a second transmitter adapted to transmit signals in a second frequency band which is non-adjacent to said first frequency band;

(c) a first transmitter network coupled to said first and second transmitters, wherein said first transmitter network is adapted to filter said first and second non-adjacent frequency bands;

(d) a first transmit antenna coupled to said first transmitter network, wherein said first transmit antenna is adapted to transmit said first and second non-adjacent frequency bands in a particular direction at a certain beamwidth;

(e) a second transmitter network coupled to said first and second transmitters, wherein said second transmitter network is adapted to filter said first and second non-adjacent frequency bands; and

(f) a second transmit antenna coupled to said second transmitter network wherein said second transmit antenna is adapted to transmit said first and second non-adjacent frequency bands in a direction different than that of said first transmit antenna.

6. The transmitter system of claim 5, wherein said first transmitter network includes a first bandpass filter for filtering signals in said first frequency band and a second bandpass filter for filtering signals in said second frequency band.

7. The transmitter network of claim 5, wherein said first transmitter network is adapted to filter signals in said first and second non-adjacent frequency bands selected from the group consisting of:

1930-1945 MHz, 1945-1950 MHz, 1950-1965 MHz, 1965-1970 MHz, 1970-1975 MHz and 1975-1990 MHz.

8. The transmitter system of claim 5, wherein said first transmit antenna is adapted to transmit said first and second non-adjacent frequency bands in the particular direction with a certain beamwidth selected from the group consisting of:

32 degrees, 65 degrees, 90 degrees, 105 degrees and 120 degrees.