Reducing stray capacitance in antenna element switching
First Claim
Patent Images
1. An antenna array comprising:
- an antenna element configured to receive an RF signal;
a PIN diode coupled to the antenna element, wherein biasing the PIN diode influences the received RF signal, wherein the PIN diode is forward biased and the received RF signal is cancelled at a stub coupled to the PIN diode; and
an inductor coupled to the stub, wherein the stub biases the pin diode while maintaining energy within the stub.
12 Assignments
0 Petitions
Accused Products
Abstract
An antenna array may include an antenna element configured to receive an RF signal. A PIN diode may selectively couple the antenna element to an RF source. Biasing the PIN diode may cancel the received RF signal at a stub coupled to the diode thereby reducing stray capacitance of the PIN diode. A method for switching antenna elements is also disclosed. A PIN diode coupled to an antenna element is biased thereby reflecting the received RF signal out-of-phase within a stub such that the signal is canceling and stray capacitance of the PIN diode is reduced.
236 Citations
19 Claims
-
1. An antenna array comprising:
-
an antenna element configured to receive an RF signal; a PIN diode coupled to the antenna element, wherein biasing the PIN diode influences the received RF signal, wherein the PIN diode is forward biased and the received RF signal is cancelled at a stub coupled to the PIN diode; and an inductor coupled to the stub, wherein the stub biases the pin diode while maintaining energy within the stub. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. An antenna array comprising:
-
an antenna element configured to receive an RF signal; a PIN diode coupled to the antenna element, wherein forward biasing of the PIN diode cancels the received RF signal at a stub coupled to the PIN diode by reflecting the RF signal out-of-phase within the stub, the cancellation of the RF signal reducing stray capacitance of the PIN diode; and a chip inductor coupled to the stub with a self-resonance at the frequency of the RF signal, the inductor configured to draw the RF signal to the stub via the forward biased PIN diode. - View Dependent Claims (13, 14)
-
-
15. A method for reducing stray capacitance in antenna element switching, comprising:
-
receiving an RF signal within an antenna element; and biasing a PIN diode coupled to the antenna element, wherein biasing the PIN diode influences the received RF signal, wherein the PIN diode is forward biased and the received RF signal is cancelled at a stub coupled to the PIN diode, the PIN diode biased with the stub while maintaining energy within the stub, wherein an inductor is connected to the stub. - View Dependent Claims (16)
-
- 17. The method of 16, wherein the cancellation of the RF signal reduces stray capacitance of the PIN diode.
Specification