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US 12,322,872 B2Granted
Feeding network device for improved direction estimation
AssigneeKorea Electronics Technology Institute
InventorsSoo Chang Chae, Ki Jin Kim, Kwang Ho Ahn
Life of this patent
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Abstract
There is provided a feeding network device for improved direction estimation. The feeding network device according to an embodiment of the disclosure includes a first coupler, a second coupler, a first delay, a second delay, a crossover, a third coupler, a fourth coupler, a third delay, and a fourth delay. Accordingly, one sum beam and a plurality of difference beams are emitted through the feeding network device of the array antenna, and improved direction estimation is possible through a plurality of monopulse ratios, and accordingly, improvement of direction estimation in a monopulse radar device is expected.
Claims8
A feeding network device comprising:
- a first coupler configured to convert a first input signal inputted through a first input port into two output signals having a 90-degree phase difference and to output the signals, and to convert a second input signal inputted through a second input port into two output signals having a 90-degree phase difference and to output the signals;
- a second coupler configured to convert a third input signal inputted through a third input port into two output signals having a 90-degree phase difference and to output the signals, and to convert a fourth input signal inputted through a fourth input port into two output signals having a 90-degree phase difference and to output the signals;
- a first delay configured to delay a second output signal of the first coupler;
- a second delay configured to delay a second output signal of the second coupler;
- a third coupler configured to convert a first output signal of the first coupler into two output signals having a 90-degree phase difference and to output the signals, and to convert a first output signal of the second coupler into two output signals having a 90-degree phase difference;
- a fourth coupler configured to convert an output signal of the first delay into two output signals having a 90-degree phase difference and to output the signals, and to convert an output signal of the second delay into two output signals having a 90-degree phase difference and to output the signals;
- a third delay configured to delay a first output signal of the third coupler;
- a first output port configured to output an output signal of the third delay;
- a second output port configured to output a second output signal of the third coupler;
- a fourth delay configured to delay a first output signal of the fourth coupler;
- a third output port configured to output an output signal of the fourth delay;
- and
- a fourth output port configured to output a second output signal of the fourth coupler.
10 more elements
A radar device comprising:
- a first coupler configured to convert a first input signal inputted through a first input port into two output signals having a 90-degree phase difference and to output the signals, and to convert a second input signal inputted through a second input port into two output signals having a 90-degree phase difference and to output the signals;
- a second coupler configured to convert a third input signal inputted through a third input port into two output signals having a 90-degree phase difference and to output the signals, and to convert a fourth input signal inputted through a fourth input port into two output signals having a 90-degree phase difference and to output the signals;
- a first delay configured to delay a second output signal of the first coupler;
- a second delay configured to delay a second output signal of the second coupler;
- a third coupler configured to convert a first output signal of the first coupler into two output signals having a 90-degree phase difference and to output the signals, and to convert a first output signal of the second coupler into two output signals having a 90-degree phase difference;
- a fourth coupler configured to convert an output signal of the first delay into two output signals having a 90-degree phase difference and to output the signals, and to convert an output signal of the second delay into two output signals having a 90-degree phase difference and to output the signals;
- a third delay configured to delay a first output signal of the third coupler;
- a first output port configured to output an output signal of the third delay;
- a second output port configured to output a second output signal of the third coupler;
- a fourth delay configured to delay a first output signal of the fourth coupler;
- a third output port configured to output an output signal of the fourth delay;
- a fourth output port configured to output a second output signal of the fourth coupler;
- and
- an array antenna which comprises antennas connected to the first output port, the second output port, the third output port, and the fourth output port, respectively.
11 more elements
Dependencies are inferred from the claim text.