JP2017120989A - Antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an antenna device comprising a power supply control distribution substrate that achieves reduction in cost and size.SOLUTION: An antenna device comprises: a transmitter/receiver 1 that transmits/receives an RF signal; an aerial wire 2 that transmits/receives an electromagnetic wave by being connected with the transmitter/receiver 1; a power supply unit 3 that supplies a power to the aerial wire 2; and a signal processing unit 4 that controls the aerial wire 2. The aerial wire 2 has: a power feeding substrate 5 that distributes the RF signal transmitted from the transmitter/receiver 1; a power supply control distribution substrate 6 that has a thick copper layer, and distributes the power supplied from the power supply unit 3 to transmission/reception modules 7-1 to 7-N; a plurality of transmission/reception modules 7-1 to 7-N that control a phase and an amplitude of the RF signal; and element antennas 8-1 to 8-N that emit the controlled RF signal into the air at transmission, and receive the electromagnetic wave at reception. The power supply control distribution substrate 6 applies a current from the power supply unit 3 to the thick copper layer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an antenna device including a phased array antenna (PAA).

  A typical phased array antenna includes an element antenna, a transmission / reception module, a power control distribution board, a power feeding board, and an antenna housing. A power supply is supplied to the transmission / reception module together with various control signals via a power supply control distribution board, and a large current can flow through the power supply system. Conventionally, power supply control distribution boards have been devised for power supply systems that require large currents.

  For example, Patent Document 1 states that “when power supply buses are soldered to a substrate or the like, the warpage of the substrate caused by the difference in the coefficient of thermal expansion between the belt-like conductive plate and the substrate, the cracking of the solder or the through hole, etc. are prevented. For the purpose of `` by forming the terminal on the end surface in the direction perpendicular to the longitudinal direction of the strip-shaped conductive plate and bending it, the bending portion absorbs the expansion / contraction strain in the longitudinal direction of the strip-shaped conductive plate, which is the most problematic, and the terminal A configuration is disclosed in which the angle formed by itself with respect to the substrate is changed from the initial angle so as to reach equilibrium. In Patent Document 1, the terminal of the power supply bus is formed in the longitudinal direction of the strip-shaped conductive plate and bent to absorb expansion / contraction strain due to the difference in thermal expansion coefficient with the substrate, and the warp of the substrate during soldering during mounting Is suppressed.

Japanese Unexamined Patent Publication No. 7-78642

  However, according to the above conventional technique, it is necessary to develop a plurality of power supply buses for each substrate, and a mounting space is required in the height direction of the substrate. Therefore, there is a problem that it is difficult to reduce the cost and size of the power supply control distribution board.

  The present invention has been made in view of the above, and an object of the present invention is to obtain an antenna device including a power supply control distribution board that realizes cost reduction and size reduction.

  In order to solve the above-described problems and achieve the object, the present invention includes a transmitter / receiver that transmits / receives an RF signal, an antenna that is connected to the transmitter / receiver and transmits / receives electromagnetic waves, a power supply that supplies power to the antenna, A signal processor for transmitting and receiving control signals to and from the antenna. The antenna has a power supply board that distributes the RF signal transmitted from the transmitter / receiver, and a thick copper layer, and distributes the power supplied from the power supply and the control signal input from the signal processor to the transmission / reception module. A distribution board, a plurality of transmission / reception modules for controlling the phase and amplitude of the RF signal, and a plurality of element antennas for radiating the controlled RF signal in the air at the time of transmission and receiving electromagnetic waves from the air at the time of reception, The power control distribution board is characterized in that the current from the power supply is passed through the thick copper layer.

  According to the present invention, there is an effect that it is possible to obtain an antenna device including a power supply control distribution board that realizes cost reduction and size reduction.

The figure which shows an example of a structure of the antenna apparatus which concerns on Embodiment 1. FIG. The figure which shows a power supply control distribution board in Embodiment 1. FIG. The figure which shows the power supply control distribution board with which the power supply buses were mounted in Embodiment 1. Schematic showing the layer structure of the power supply control distribution board in the first embodiment The figure which shows an example of a structure of the antenna apparatus which concerns on Embodiment 2. FIG. The figure which shows a power supply control distribution board in Embodiment 2.

  Hereinafter, an antenna device according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating an example of a configuration of an antenna device according to Embodiment 1 of the present invention. The antenna device shown in FIG. 1 includes a transmitter / receiver 1 that transmits and receives an RF signal, and an antenna 2 that receives the RF signal from the transmitter / receiver 1 and transmits an electromagnetic wave, receives the electromagnetic wave from the air, and outputs the electromagnetic wave to the transmitter / receiver 1. And a power supply 3 that supplies power to the antenna 2 and a signal processor 4 that transmits and receives control signals to control the antenna 2. The antenna 2 transmits power supply board 5 that distributes the RF signal input from the transmitter / receiver 1, power supplied from the power supply 3 and control signal input from the signal processor 4 to the transmission / reception modules 7-1 to 7-N. A power supply control distribution board 6 that distributes the signals, N transmission / reception modules 7-1 to 7-N that control the phase and amplitude of the RF signal, and an RF signal whose phase and amplitude are controlled during transmission as an electromagnetic wave. Thus, element antennas 8-1 to 8-N that receive electromagnetic waves from the air at the time of reception are provided. The amplitude control includes amplitude amplification.

  The transceiver 1 is connected to a power supply board 5, and the power supply 3 and the signal processor 4 are connected to a power supply control distribution board 6. Each of the distribution ends of the power supply board 5 is connected to each of the N transmission / reception modules 7-1 to 7-N, and each of the transmission / reception modules 7-1 to 7-N includes the element antennas 8-1 to 8-N. Connected to each. Each distribution end of the power supply control distribution board 6 is connected to each of the N transmission / reception modules 7-1 to 7-N.

  FIG. 2 is a diagram showing the power supply control distribution board 6. 2A is a side view showing a schematic configuration of the power supply control distribution board 6 in FIG. 1, and FIG. 2B is a perspective view showing the power supply control distribution board 6 in FIG. A power supply control distribution board 6 shown in FIG. 2A has a thick copper layer, a printed wiring board (PWB) 11 having a thick copper layer, and a signal that transmits and receives control signals to and from the signal processor 4. The wiring 12 is provided with power supply wirings 13A and 13B for supplying power from the power supply 3, and connection portions 14-1 to 14-N to the transmission / reception modules 7-1 to 7-N.

  FIG. 3 is a diagram illustrating the power control distribution board 20 on which the power supply buses are mounted. FIG. 3 is a comparative example of FIG. The power supply control distribution board 20 to which the power supply buses shown in FIG. 3 are attached includes a PWB 21 for power supply buses having a thick copper layer, a signal wiring 22 for transmitting / receiving control signals to / from the signal processor 4, and power from the power supply 3 Power supply wirings 23A and 23B to be supplied, connection portions 24-1 to 24-N to transmission / reception modules 7-1 to 7-N, and power supply buses 25-1 to 25-12 are provided. In the power supply control distribution board 20 to which the power supply buses are attached, a large current that has flowed to the PWB 21 via the power supply wirings 23A and 23B and the power supply buses 25-1 to 25-12 from the power supply unit 3 is supplied from the connection unit 24-1. 24-N.

  In the power supply control distribution board 6 having the thick copper layer, a large current flows directly to the PWB 11 having the thick copper layer, and is supplied to the connecting portions 14-1 to 14-N.

  FIG. 4 is a schematic diagram showing the layer structure of the power supply control distribution board 6. The power supply control distribution board 6 shown in FIG. 4 is composed of layers L9 to L12, which are thick copper layers, and can supply a large current power system layer 30 capable of flowing a large current, and other power supplies that do not require a large current. It is a pattern layer through which a system layer and various control signals flow, and includes small current layers 31A and 31B that sandwich a large current power system layer 30. The small current layer 31A is composed of layers L1 to L8, and the small current layer 31B is composed of layers L13 to L20. In the layers L1 to L20, adjacent layers are insulated.

  In FIG. 4, the large current power system layer 30 that requires a large current is formed thicker than the small current layers 31A and 31B, which are thin copper foil layers, and the large current power system layer 30 is a thick copper of 240 μm or more. A foil layer can be illustrated. In order to reduce conductor loss, two layers each of the forward path and the return path are assigned to the large current power supply system layer 30. Thereby, a large current can be caused to flow with a loss equivalent to that when the power supply buses 25-1 to 25-12 in the comparative example of FIG. 3 are used.

  Further, as shown in FIG. 4, the layers L9 and L11 that are the forward path and the layers L10 and L12 that are the return path are alternately arranged, and the electromagnetic interference can be suppressed by adjoining the forward path and the return path, EMC (Electro Magnetic Compatibility) coping ability can be improved more than when the power supply bus is used.

Embodiment 2. FIG.
FIG. 5 is a diagram showing an example of the configuration of the antenna device according to Embodiment 2 of the present invention. The antenna device shown in FIG. 5 is different from the antenna device shown in FIG. 1 in that the antenna 2 is replaced with the antenna 2a. The antenna 2a includes a power control distribution board 6a, and the power control distribution board 6a includes an energy bank 60. The other configuration of the antenna device shown in FIG. 5 is the same as that of the antenna device shown in FIG.

  FIG. 6 is a diagram showing the power supply control distribution board 6a. 6A is a side view showing a schematic configuration of the power supply control distribution board 6a shown in FIG. 5, and FIG. 6B is a perspective view showing the power supply control distribution board 6a shown in FIG. The power control distribution board 6a shown in FIG. 6A includes a PWB 11 having a thick copper layer, a signal wiring 12 that transmits and receives control signals to and from the signal processor 4, and a power wiring 13A that is supplied with power from the power supply 3. , 13B, connection portions 14-1 to 14-N to the transmission / reception modules 7-1 to 7-N, and a capacitor group 41.

  Capacitor group 41 corresponds to energy bank 60 shown in FIG. 5, and is arranged in the space occupied by power supply buses 25-1 to 25-12 in FIG. When the antenna device shown in FIG. 5 is a radar, pulse driving of the power supply is required. However, in the configuration without the energy bank, the current response from the power supply 3 to the transmission / reception modules 7-1 to 7-N is not in time for the sudden rise of the power supply, and the voltage sags. Thus, when the energy bank by the capacitor group is provided, the charge to be supplied to the transmission / reception modules 7-1 to 7-N can be accumulated, and it is possible to cope with the sudden rise of the power supply.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  DESCRIPTION OF SYMBOLS 1 Transmitter / receiver, 2, 2a Aerial line, 3 Power supply, 4 Signal processor, 5 Power supply board, 6, 6a, 20 Power supply control distribution board, 7-1 to 7-N Transmission / reception module, 8-1 to 8-N element Antenna, 11, 21 PWB, 12, 22 signal wiring, 13A, 13B, 23A, 23B power wiring, 14-1 to 14-N, 24-1 to 24-N connection, 25-1 to 25-12 power bus , 30 Large current power system layer, 31A, 31B Small current layer, 41 Capacitor group, 60 Energy bank.

Claims (3)

A transceiver for transmitting and receiving RF signals;
An antenna that is connected to the transceiver to transmit and receive electromagnetic waves;
A power supply for supplying power to the antenna;
A signal processor for transmitting and receiving control signals to the antenna,
The antenna is
A power supply board for distributing the RF signal transmitted from the transceiver;
A power control distribution board that has a thick copper layer and distributes the power supplied from the power supply and the control signal input from the signal processor to a transmission / reception module;
A plurality of transceiver modules for controlling the phase and amplitude of the RF signal;
A plurality of element antennas that radiate the controlled RF signal into the air during transmission and receive electromagnetic waves from the air during reception;
The antenna apparatus according to claim 1, wherein the power supply control distribution board passes a current from the power supply to the thick copper layer.   The antenna device according to claim 1, wherein the power control distribution board has an energy bank.   The antenna device according to claim 2, wherein the energy bank is a capacitor group.

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