COMPACT DIRECTIONAL COUPLER USING SEMICONDUCTOR PROCESS AND MOBILE RFID READER TRANSCEIVER SYSTEM USING THE SAME
1 Assignment
0 Petitions
Accused Products
Abstract
A compact directional coupler and a mobile Radio-Frequency Identification (RFID) reader transceiver system using the same. The compact directional coupler can include a primary transmission line, a secondary transmission line, and a second capacitor connected in parallel to the secondary transmission line. The coupler can further include a first capacitor connected in parallel to the primary transmission line and capacitors connected between both end of the first capacitors and the ground respectively. A mobile RFID reader transceiver system can include a transmission terminal circuit, a power amplifier, the compact directional coupler, an antenna, a low noise amplifier, and the reception terminal circuit. The system further can include a band-pass filer, and/or a power combiner to match an output terminal of the power amplifier.
39 Citations
51 Claims
-
1-22. -22. (canceled)
-
23. A compact directional coupler using a semiconductor process, the compact directional coupler comprising:
-
a primary transmission line formed on a semiconductor substrate; a secondary transmission line formed on the semiconductor substrate; and a capacitor connected in parallel to the secondary transmission line. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 44)
-
-
34. A mobile Radio-Frequency Identification (RFID) reader transceiver system comprising:
-
a transmission terminal circuit configured to process a transmission signal; a power amplifier configured to amplify the transmission signal; a transmission/reception antenna configured to transmit the transmission signal and receive a reception signal; a low noise amplifier configured to amplify the reception signal; a reception terminal circuit configured to process the reception signal; and a directional coupler configured to connect the transmission/reception antenna to the power amplifier and the low noise amplifier; wherein the directional coupler comprises; a primary transmission line formed on a semiconductor substrate; a secondary transmission line formed on the semiconductor substrate; and a capacitor connected in parallel to the secondary transmission line. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43)
-
-
45. A compact directional coupler comprising:
-
a primary transmission line having a value of inductance, wherein a signal is transmitted thorough the primary transmission line; a secondary transmission line having a value of inductance, the secondary transmission line extracting a portion of the power of the signal transmitted through the primary transmission line; and a capacitor connected in parallel to the secondary transmission line. - View Dependent Claims (46, 47, 48, 49, 50)
-
-
51. A mobile Radio-Frequency Identification (RFID) reader transceiver system comprising:
-
a transmission terminal circuit configured to process a transmission signal; a power amplifier configured to amplify the transmission signal; a power combiner configured to match an output terminal of the power amplifier; a transmission/reception antenna configured to transmit the transmission signal and receive a reception signal; a low noise amplifier configured to amplify the reception signal while maintaining a high signal-to-noise ratio of the reception signal; a reception terminal circuit configured to process the reception signal; and a directional coupler configured to connect the transmission/reception antenna to the power combiner and the low noise amplifier; wherein the directional coupler comprises; a primary transmission line formed on a semiconductor substrate; a secondary transmission line formed on the semiconductor substrate; a capacitor connected in parallel to the primary transmission line; a capacitor connected in parallel to the secondary transmission line; a capacitor arranged between one port of the primary transmission line and the ground; a capacitor arranged between another port of the primary transmission line and the ground; and a resistor arranged between one of two ports of the secondary transmission line and the ground, wherein the primary transmission line and the secondary transmission line are formed in a spiral arrangement using a metal line process of a semiconductor process, an outside loop of the primary transmission line surrounds the secondary transmission line, and an outside loop of the secondary transmission line surrounds an inside loop of the primary transmission line, wherein the directional coupler and the power combiner are packaged in a single chip using a semiconductor process, and wherein the semiconductor process is an integrated passive device process.
-
Specification