IP Library › Granted Patent US 11,785,548
Granted Patent B2
US 11,785,548 · App. 17/509,870 · Granted Oct 10, 2023

Transmission apparatus

Inventor: Masayoshi Oshiro (Ota Tokyo, JP)
Assignees: Kabushiki Kaisha Toshiba; Toshiba Electronic Devices & Storage Corporation
H04W52/0235H04W4/80H04W76/10H04W76/30
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Quick Facts
Patent No.
US 11,785,548
App. No.
17/509,870
Granted
Oct 10, 2023
Kind
B2
Abstract

A transmission apparatus according to an embodiment includes a power amplifier, an antenna switch, and a control circuit. The power amplifier amplifies and outputs a transmission signal. The antenna switch switches, among at least two or more antennas, an antenna configured to output the transmission signal from the power amplifier. The control circuit performs output power control of the power amplifier when the control circuit outputs to the antenna switch a switching control signal for switching the antenna.

Claims (12)

1. A transmission apparatus comprising:

a control circuit configured to generate a first signal having an in-phase component and a second signal having an orthogonal component of a carrier wave from transmission data and perform amplitude control of the first signal and the second signal when the control circuit outputs a switching control signal for switching to any one of at least two or more antennas, and

an antenna switch configured to switch the antenna configured to output the transmission data based on the switching control signal, wherein

the control circuit outputs the switching control signal to the antenna switch to switch the antenna at a center of a predetermined switching period.

2. The transmission apparatus according to claim 1 , wherein

the control circuit decreases respective amplitudes of the first signal and the second signal until the control circuit switches the antenna and increases the respective amplitudes the first signal and the second signal after switching the antenna within the predetermined switching period.

3. The transmission apparatus according to claim 1 , wherein

the control circuit performs the amplitude control in synchronization with the switching of the antenna.

4. A transmission apparatus comprising:

a control circuit configured to generate a first signal having an in-phase component and a second signal having an orthogonal component of a carrier wave from transmission data and perform amplitude control of the first signal and the second signal when the control circuit outputs a switching control signal for switching to any one of at least two or more antennas, and

an antenna switch configured to switch the antenna configured to output the transmission data based on the switching control signal, wherein

the control circuit performs the switching of the antenna and the amplitude control a plurality of times within one packet.

Priority Claims (1)
JP 2019-160570 · Sep 3, 2019 · national
Continuity (2)
Division 16802333 · Feb 26, 2020
Related Publication 20220046545A1 · Feb 10, 2022