Antenna mutual coupling neutralizer
First Claim
1. A mutual coupling low-Q resonant circuit neutralizer for neutralizing coupling between patch antennas of an antenna used in a mobile communication system, comprising:
- a first capacitor having a first end and a second end, the first end of the first capacitor directly connected to one patch antenna;
an impedance element having a first end and a second ends the first end of the impedance element connected to the second end of the first capacitor;
a second capacitor having a first end and a second end, the first end of the second capacitor directly connected to the second end of the impedance element and the second end of the second capacitor connected to a second patch antenna; and
wherein the dimensions of the impedance element and the dimensions of the first and second capacitors combine to form a low-Q circuit configuration to neutralize adverse mutual coupling.
2 Assignments
0 Petitions
Accused Products
Abstract
A mutual coupling neutralizer for neutralizing adverse mutual coupling between a pair of patch antennas for mobile communication system. The coupling neutralizer includes a first and second capacitor each having a first end and a second end, where the first ends are coupled to a respective patch antenna. The neutralizer further includes a high impedance transmission line connected to the second ends of the capacitors. The transmission line and capacitors are sized and configured to neutralize adverse mutual coupling between the pair of patch antennas over a predetermined frequency band. The neutralization of mutual coupling is achieved by extracting a signal present at one patch antenna and injecting the signal at the other patch antenna at a substantially equal amplitude and opposite in phase.
111 Citations
13 Claims
-
1. A mutual coupling low-Q resonant circuit neutralizer for neutralizing coupling between patch antennas of an antenna used in a mobile communication system, comprising:
-
a first capacitor having a first end and a second end, the first end of the first capacitor directly connected to one patch antenna; an impedance element having a first end and a second ends the first end of the impedance element connected to the second end of the first capacitor; a second capacitor having a first end and a second end, the first end of the second capacitor directly connected to the second end of the impedance element and the second end of the second capacitor connected to a second patch antenna; and wherein the dimensions of the impedance element and the dimensions of the first and second capacitors combine to form a low-Q circuit configuration to neutralize adverse mutual coupling. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A cellular antenna for a mobile communication system, comprising:
-
at least one antenna panel having formed thereon a first, linear array of a plurality of patch antennas for receiving signals and a second linear array of a plurality of patch antennas, interleaved with the elements of the first array, for transmitting signals; and a plurality of mutual coupling low-Q resonant circuit neutralizers individually connected between a transmitting patch antenna and a receiving patch antenna. - View Dependent Claims (9, 10, 11)
-
-
12. A method for neutralizing coupling between a transmitting patch antenna and a receiving patch antenna, comprising the steps of:
-
extracting a signal present at the transmitting patch antenna; transmitting the extracted signal through a low-Q resonant circuit; and injecting the extracted signal at the receiving patch antenna at an amplitude substantially equal to the amplitude of the extracted signal and opposite in phase from the extracted signal.
-
-
13. A communication system comprising:
-
a receiving patch antenna; a transmitting patch antenna; and a low-Q resonant circuit means for neutralizing coupling between the receiving patch antenna and the transmitting patch antenna, the low-Q resonant circuit means comprising; a first capacitor having a first end and a second end, the first end connected to the receiving patch antenna; an impedance element having a first end and a second end, the first end connected to the second end of the first capacitor; a second capacitor having a first end and a second end, the first end connected to the second end of the impedance element and the second end connected to the transmitting patch antenna; and wherein the dimensions of the impedance element and the dimensions of the first and second capacitors combine to form a low-Q circuit configuration to neutralize adverse mutual coupling.
-
Specification