Power detection circuit, transmitter, and power detection method
AssigneeNEC Corporation
InventorAkihiro Kirisawa
Life of this patent
Estimating the term…
Abstract
From an antenna provided in a transmitter for transmitting a radio signal, the radio signal is transmitted in such a manner of: detecting transmission power of a transmission signal outputted to the antenna; detecting reflection power of a reflection signal reflected from the antenna; integrating the difference between the transmission power and the reflection power at a timing of transmitting a preamble signal of the radio signal; comparing the difference value obtained by the integration with a predetermined threshold value, and outputting an alarm in the case where the result of the comparison is that the difference value obtained by the integration is smaller than the threshold value.
Claims10
A power detection circuit comprising:
- a transmission power detection section that detects transmission power of a transmission signal which, in order to cause a radio signal to be transmitted from an antenna provided in a transmitter for transmitting the radio signal, is outputted to the antenna;
- a reflection power detection section that detects reflection power of a reflection signal reflected from the antenna;
- an integration section that integrates the difference between the transmission power and the reflection power at a timing of transmitting a preamble signal of the radio signal;
- and
- a comparison section that compares the difference value obtained by the integration performed by the integration section with a predetermined threshold value and that outputs an alarm in the case where the result of the comparison is that the difference value obtained by the integration performed by the integration section is smaller than the predetermined threshold value.
A power detection method comprising:
- a process that detects transmission power of a transmission signal which, in order to cause a radio signal to be transmitted from an antenna provided in a transmitter for transmitting the radio signal, is outputted to the antenna;
- a process that detects reflection power of a reflection signal reflected from the antenna;
- a process that integrates the difference between the transmission power and the reflection power at a timing of transmitting a preamble signal of the radio signal;
- a process that compares the difference value obtained by the integration with a predetermined threshold value;
- and
- a process that outputs an alarm in the case where the result of the comparison is that the difference value obtained by the integration is smaller than the threshold value.
Dependencies are inferred from the claim text.