Abstract: A filter is disposed on a base board. The filter includes a first portion, a second portion, a ground portion, a first coupling portion and a second coupling portion. The first portion is disposed on a first layer in the base board to input signals. The second portion is disposed on the first layer to output signals. The ground portion is disposed on a second layer in the base board. The first coupling portion is disposed on the first layer. The first coupling portion is electrically coupled to the first portion and the second portion. The first coupling portion is electrically coupled to the ground portion through via holes. The second coupling portion is disposed on the first layer. The second coupling portion is electrically coupled to the first portion and the second portion. The second coupling portion is electrically coupled to the ground portion through the via holes.

Abstract: A filter is disposed on a base board. The filter includes a first portion, a second portion, a ground portion, a first coupling portion and a second coupling portion. The first portion is disposed on a first layer in the base board to input signals. The second portion is disposed on the first layer to output signals. The ground portion is disposed on a second layer in the base board. The first coupling portion is disposed on the first layer. The first coupling portion is electrically coupled to the first portion and the second portion. The first coupling portion is electrically coupled to the ground portion through via holes. The second coupling portion is disposed on the first layer. The second coupling portion is electrically coupled to the first portion and the second portion. The second coupling portion is electrically coupled to the ground portion through the via holes.

Abstract: A band-PASS filter disposed on a printed circuit board comprises a first terminal, a second terminal, a first coupling portion, a second coupling portion and a connection portion. The first terminal and the second terminal are used to receive or output electromagnetic signals respectively. The first coupling portion and the second coupling portion are disposed between the first terminal and the second terminal to couple the electromagnetic signals. The connection portion is connected to the first coupling portion and the second coupling portion. The first terminal partly accommodates in a first coupling portion groove. The second terminal partly accommodates in a second coupling portion groove.

Abstract: A regulating circuit is configured to adjust current consumptions. The regulating circuit comprises a switch and at least two matching circuits. The at least two matching circuits are configured to match different input signals and reduce current consumptions. The switch is coupled to the at least two matching circuits. According to different input signals, the switch switches on one matching circuit and switches the other matching circuits off. Each matching circuit comprises a transmission line and a varactor. The transmission line is coupled to the switch. The transmission line is configured to adjust a phase angle in a Smith chart quadrant. The varactor is configured to further adjust the phase angle. Thus the phase angle is adjusted to a predetermined position in the certain quadrant. An optimizing circuit is also provided. In the present disclosure, different input signals can be transmitted in a corresponding matching circuit to optimize current consumptions.

Abstract: A regulating circuit is configured to adjust current consumptions. The regulating circuit comprises a switch and at least two matching circuits. The at least two matching circuits are configured to match different input signals and reduce current consumptions. The switch is coupled to the at least two matching circuits. According to different input signals, the switch switches on one matching circuit and switches the other matching circuits off. Each matching circuit comprises a transmission line and a varactor. The transmission line is coupled to the switch. The transmission line is configured to adjust a phase angle in a Smith chart quadrant. The varactor is configured to further adjust the phase angle. Thus the phase angle is adjusted to a predetermined position in the certain quadrant. An optimizing circuit is also provided. In the present disclosure, different input signals can be transmitted in a corresponding matching circuit to optimize current consumptions.

Abstract: A band-PASS filter disposed on a printed circuit board comprises a first terminal, a second terminal, a first coupling portion, a second coupling portion and a connection portion. The first terminal and the second terminal are used to receive or output electromagnetic signals respectively. The first coupling portion and the second coupling portion are disposed between the first terminal and the second terminal to couple the electromagnetic signals. The connection portion is connected to the first coupling portion and the second coupling portion. The first terminal partly accommodates in a first coupling portion groove. The second terminal partly accommodates in a second coupling portion groove.

Abstract: An electronic device eliminating wireless signal interference includes a first radio unit, a second radio unit, and a quadrature coupler. The first radio unit includes a first antenna and a first transceiver. The first transceiver is configured to output first wireless signals via a first port. The second radio unit operates on a same frequency of the first radio unit, and includes a second antenna and a second transceiver. The second transceiver is configured to output second wireless signals via a second port. The quadrature coupler is connected to the first and the second ports, configured to separate the first wireless signals from the second wireless signals, and further to cause a first radiation field pattern of the first wireless signals to be orthogonal with a second radiation field pattern of the second wireless signals.

Abstract: An electronic device eliminating wireless signal interference includes a first radio unit, a second radio unit, and a quadrature coupler. The first radio unit includes a first antenna and a first transceiver. The first transceiver is configured to output first wireless signals via a first port. The second radio unit operates on a same frequency of the first radio unit, and includes a second antenna and a second transceiver. The second transceiver is configured to output second wireless signals via a second port. The quadrature coupler is connected to the first and the second ports, configured to separate the first wireless signals from the second wireless signals, and further to cause a first radiation field pattern of the first wireless signals to be orthogonal with a second radiation field pattern of the second wireless signals.

Abstract: A mobile communication device (1000) includes a CPU (1300), a first antenna (1110), a first front-end circuit (1120), a second antenna (1210), and a second front-end circuit (1220). The first antenna transmits and receives first signals. The first front-end circuit, located between the first antenna and the CPU, includes a first switch (1122), a first power amplifier (1124), and a first filter. The second antenna transmits and receives second signals. The second front-end circuit, located between the second antenna and the CPU, includes a second switch (1221), a second power amplifier (1223), a second filter (1222), and at least one third filter (1224). The second switch is connected to the second antenna. The second power amplifier amplifies signals from the CPU. The second filter is connected to the second switch and the second power amplifier. The third filter is connected to the second switch.

Abstract: A mobile communication device (1000) includes a CPU (1300), a first antenna (1110), a first front-end circuit (1120), a second antenna (1210), and a second front-end circuit (1220). The first antenna transmits and receives first signals. The first front-end circuit, located between the first antenna and the CPU, includes a first switch (1122), a first power amplifier (1124), and a first filter. The second antenna transmits and receives second signals. The second front-end circuit, located between the second antenna and the CPU, includes a second switch (1221), a second power amplifier (1223), a second filter (1222), and at least one third filter (1224). The second switch is connected to the second antenna. The second power amplifier amplifies signals from the CPU. The second filter is connected to the second switch and the second power amplifier. The third filter is connected to the second switch.