Abstract:
An amplifier includes a gain transistor including a control terminal to receive an input signal. A degeneration inductor is coupled between the first terminal of the gain transistor and ground. A shunt inductor and a capacitor are coupled in series between the control terminal of the gain transistor and ground, and form a filter to attenuate frequencies of the input signal within a frequency range. The degeneration inductor and the shunt inductor form a transformer to provide impedance matching.
Abstract:
A transmission/reception switching device 100 according to one embodiment of the present invention includes: a first reactance 2 including a first inductor 8 and a first capacitor 7, the first reactance 2 being connected between an antenna 17 and a transmission section 1 which outputs a signal; a second reactance 4 including a second inductor 15 and a second capacitor 14, the second reactance 4 being connected between a predetermined node 16 and a reception terminal 5; and a high frequency switch 3 connected to an output end of one of the first inductor 8 and the first capacitor 7 at the predetermined node 16. Constants of the second inductor 15 and the second capacitor 14 have values for establishing matching under influence of a mismatch caused by the first reactance 2 during signal reception.
Abstract:
A TDD radio unit and a real-time RX supervision method used therein are provided. The method comprises steps of: setting the radio unit into an RX supervision status in a TX timeslot, wherein the setting comprises: connecting a TX observation module in the radio unit to a termination port of a Transmit/Receive (TR) switch in the radio unit; and setting all components in the RX path in a power-on status; detecting a gain of the TX observation module by means of a signal from the TR switch passing through the TX observation module and a gain of the RX path by means of a TX leakage signal passing through the RX path; calculating a gain difference between the TX observation module and the RX path; and comparing the calculated gain difference with a preset gain difference to determine a state of the RX path. With the TDD radio unit and RX supervision method, the TX leakage signal is used, and thus no extra simulation source is need. Furthermore, a real time supervision is performed.
Abstract:
A coexistence interference mitigation method is provided. In a wireless network, a wireless device is equipped with multiple radios in the same device platform. The wireless device also has a control entity that communicates with the multiple co-located radio modules. A first radio module receives a notification from the control entity. The notification informs a critical signaling status of a second radio module co-located with the first radio module. Upon receiving the notification, the first radio module stops uplink transmission due to coexistence interference and transmits a coexistence indicator to its serving eNB. After a certain period, the first radio module receives a second notification that informs a completion status of the critical signaling of the second radio module. Upon receiving the second notification, the first radio module resumes uplink transmission and transmits a coexistence resume indicator to the eNB.
Abstract:
A high-frequency circuit device comprising at least first and second antenna terminals, at least first and second transmitting terminals for a first communications system, at least first and second receiving terminals for a first communications system, two or more switch circuits, and two or more filter circuits, the first transmitting terminal for the first communications system being connectable to the first antenna terminal, the second transmitting terminal for the first communications system being connectable to the second antenna terminal, the first receiving terminal for the first communications system being connectable to the first antenna terminal, and the second receiving terminal for the first communications system being connectable to the second antenna terminal.
Abstract:
The invention provides wireless communications apparatus comprising: a wireless communications device comprising: an antenna module; circuitry in communication with the antenna module; a circuit interface within the circuitry or between the circuitry and the antenna module; and impedance matching circuitry configurable to adjust an impedance match at the circuit interface; and a controller in data communication with a memory storing a user profile associated with the wireless communications device, or with a user of the wireless communications device, the user profile comprising configuration data relating to one or more impedance matching configurations of the impedance matching circuitry, the configuration data being associated with one or more parameters of the wireless communications device, wherein the controller is configured to use configuration data from the user profile to configure the impedance matching circuitry responsive to a determination of one or more parameters of the device associated with that configuration data.
Abstract:
An antenna module according to one embodiment of the present invention is provided with: an antenna; a circuit which uses the antenna to transmit and receive wireless signals; a housing for accommodating the circuit such that a periphery of the circuit is covered; an antenna-accommodating part for accommodating the antenna such that the antenna is cap - able of transmitting and receiving the wireless signals; and a first connector which is joined to the housing, and which inputs and outputs the signals transmitted and received by the circuit.
Abstract:
An apparatus includes a first amplifier stage configured to amplify a first carrier signal. The apparatus includes a second amplifier stage configured to amplify a second carrier signal. A resistive-capacitive (RC) network is coupled to the first amplifier stage and to the second amplifier stage. The RC network includes a resistive element coupled to a capacitive element.