Alpha Networks Inc.

Rong- Fa Kuo

Ming-Chih Peng

An impedance matching structure is disposed on a multilayer circuit board for matching an impedance of a transmission line for transmitting an electronic signal. At least one redundant conducting section is coupled to a conductive member of the transmission line between input and output terminals of the transmission line. The conductive member and the redundant conducting section are disposed in a corresponding plating hole. At least one grounding member disposed adjacent to but separated from either or both of the conductive member of the transmission line and the at least one redundant conducting section in a capacitor structure for impedance matching. The at least one grounding member includes a first grounding member penetrating through at least two layers of the multilayer circuit board.

Impedance matching structure of transmission line in multilayer circuit board

In a testing circuit performing a testing operation to detect an RF circuit characteristic, a first filter unit is provided, having a first external terminal electrically coupled to a testing signal and a second external terminal electrically coupled to an RF circuit of the RF device. The first filter unit is configured to allow the testing signal to enter the RF circuit while blocking an RF signal transmitted in the RF circuit from entering the testing circuit. In addition, a testing-result informing unit is provided, having an external input electrically coupled to the first external terminal, and generating an informing signal, which indicates a condition of the RF circuit according to an electric level at the external input.

Circuit and method for testing RF device and RF device with built-in testing circuit

In an RF device, an RF circuit includes an RF circuit connector optionally coupling thereto an RF element for transmitting or receiving an RF signal; and a power supply module selectively outputting power to the RF circuit connector according to a control signal. In addition, a testing circuit includes a first filter unit having a first external terminal electrically coupled to a testing signal and a second external terminal electrically coupled to the RF circuit, wherein the first filter unit is configured to allow the testing signal to enter the RF circuit while blocking an RF signal transmitted in the RF circuit from entering the testing circuit; and a testing-result informing unit having an external input electrically coupled to the first external terminal, and determining contents of the control signal according to an electric level at the external input.

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Hsinchu, Taiwan

Rong- Fa Kuo