MULTIPLE FREQUENCY ANTENNA ARRAY FOR USE WITH AN RF TRANSMITTER OR RECEIVER

• US 20100053009A1
• Filed: 11/06/2009
• Published: 03/04/2010
• Est. Priority Date: 09/28/2006
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: ROFOUGARAN, AHMADREZA (REZA)
• Granted Patent: US 8,010,062 B2
• Time in Patent Office: Days
• US Class Current: 343/747
• CPC Class Codes: H01Q 1/2258 used with computer equipment
• CPC Class Codes: H01Q 1/241 used in mobile communications, e.g. GSM H01Q1/247, H01Q1/248 take precedence
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• 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: H01Q 25/00 Antennas or antenna systems providing at least two radiating patterns arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00
• CPC Class Codes: H01Q 5/00 Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements combinations of separate active antenna units operating in different wavebands and connected to a common feeder system H01Q21/30

Abstract

A multiple frequency antenna array includes a first antenna circuit and a second antenna circuit. The first antenna circuit has a first radiation pattern and is tuned to a first carrier frequency. The first antenna circuit transmits a first representation of a radio frequency (RF) signal at the first carrier frequency, where the first carrier frequency corresponds to a carrier frequency of the RF signal and a first frequency offset. The second antenna circuit has a second radiation pattern and is tuned to a second carrier frequency. The second antenna circuit transmits a second representation of the RF signal at the second carrier frequency, where the second carrier frequency corresponds to the carrier frequency of the RF signal and a second frequency offset.

Claims

1. A multiple frequency antenna array comprises:

a first antenna circuit has a first radiation pattern and is tuned to a first carrier frequency, wherein the first antenna circuit transmits a first representation of a radio frequency (RF) signal at the first carrier frequency, wherein the first carrier frequency corresponds to a carrier frequency of the RF signal and a first frequency offset; and

a second antenna circuit has a second radiation pattern and is tuned to a second carrier frequency, wherein the second antenna circuit transmits a second representation of the RF signal at the second carrier frequency, wherein the second carrier frequency corresponds to the carrier frequency of the RF signal and a second frequency offset.

2. The multiple frequency antenna array of claim 1, wherein each of the first and second antenna circuits comprises:

an antenna having a resistive component, an inductive component, and a capacitive component, wherein the resistive component, the inductive component, and the capacitive component have a value to provide a resonant frequency corresponding to the first or second carrier frequency and to provide a quality factor for a predetermined level of frequency spectrum overlap between the first and second antenna circuits.

3. The multiple frequency antenna array of claim 2, wherein each of the first and second antenna circuits comprises at least one of:

a resistor coupled to the antenna to provide, in combination with the resistive component of the antenna, a resistance of the first or second antenna circuit;

a capacitor to the antenna to provide, in combination with the capacitive component of the antenna, a capacitance of the first or second antenna circuit; and

an inductor to the antenna to provide, in combination with the inductive component of the antenna, an inductance of the first or second antenna circuit, wherein at least one of the resistor, the capacitor, and the inductor, in combination with, the resistive component, the inductive component, and the capacitive component provide the resonant frequency corresponding to the first or second carrier frequency and provide the quality factor for the predetermined level of frequency spectrum overlap between the first and second antenna circuits.

4. The multiple frequency antenna array of claim 2, wherein each of the first and second antenna circuits comprises at least one of:

an adjustable resistor coupled to the antenna to provide, in combination with the resistive component of the antenna, a resistance of the first or second antenna circuit;

an adjustable capacitor to the antenna to provide, in combination with the capacitive component of the antenna, a capacitance of the first or second antenna circuit; and

an adjustable inductor to the antenna to provide, in combination with the inductive component of the antenna, an inductance of the first or second antenna circuit, wherein at least one of the adjustable resistor, the adjustable capacitor, and the adjustable inductor, in combination with, the resistive component, the inductive component, and the capacitive component provide the resonant frequency corresponding to the first or second carrier frequency and provide the quality factor for the predetermined level of frequency spectrum overlap between the first and second antenna circuits.

5. The multiple frequency antenna array of claim 2, wherein each of the first and second antenna circuits comprises:

an impedance matching circuit coupled to the antenna, wherein the impedance matching circuit is tuned to provide a desired impedance at the first or second carrier frequency.

6. The multiple frequency antenna array of claim 2 comprises:

the antenna of the first antenna circuit being a distance of approximately one-half wavelength of the carrier frequency of the RF signal from the antenna of the second antenna circuit.

7. The multiple frequency antenna array of claim 2, wherein each of the antennas of the first and second antenna circuit comprises least one of:

a monopole antenna;

a dipole antenna;

a Yagi antenna; and

a helical antenna.

8. The multiple frequency antenna array of claim 1 comprises:

a third antenna circuit has a third radiation pattern and is tuned to a third carrier frequency, wherein the third antenna circuit transmits a third representation of the RF signal at the third carrier frequency, wherein the third carrier frequency corresponds to the carrier frequency of the RF signal and a third frequency offset; and

a fourth antenna circuit has a fourth radiation pattern and is tuned to a fourth carrier frequency, wherein the fourth antenna circuit transmits a fourth representation of the RF signal at the fourth carrier frequency, wherein the fourth carrier frequency corresponds to the carrier frequency of the RF signal and a fourth frequency offset.

9. The multiple frequency antenna array of claim 1 comprises:

a third antenna circuit has a third radiation pattern and is tuned to the first carrier frequency, wherein the third antenna circuit transmits a third representation of the RF signal at the first carrier frequency; and

a fourth antenna circuit has a fourth radiation pattern and is tuned to the second carrier frequency, wherein the fourth antenna circuit transmits a fourth representation of the RF signal at the second carrier frequency.