JPH01311626A - Transmitter/receiver for adjusting direction of antenna - Google Patents

Abstract

PURPOSE:To simplify structure by using a microwave directly without performing conversion between the microwave and an intermediate frequency, and sharing a change-over switch as a transmission/reception sharing apparatus part and a microwave amplifier in reception also in transmission. CONSTITUTION:At the time of receiving an antenna direction adjusting signal sent from an opposite side device, a microwave signal received at the transmission/reception sharing apparatus part 1 is inputted to a low-noise and large power amplifier 3 via a first change-over switch 5, and is amplified, and is demodulated by a detector 4 via a second change-over switch 4, then, reception output is generated. Meanwhile, at the time of transmitting the antenna direction adjusting signal, the change-over switches 5 and 5 are switched, and the microwave signal from a micro oscillator 2 passes the change-over switch 5, the amplifier 3, and the change-over switch 6, and is sent to the opposite side device as transmission and reception for adjusting the antenna direction of the large power of the microwave via the transmission/reception sharing apparatus part 1. In such a way, the device can be miniaturized compared with a case where a transmitter and a receiver are provided separately.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a transmitting/receiving device for antenna direction adjustment, particularly to a device for adjusting the direction of each antenna while receiving microwave transmission signals from antennas installed at two locations, and is as small as possible. With the aim of realizing the first and second changeover switches, the received signal from the transmitter/receiver unit is amplified by the amplifier via the first changeover switch, and then amplified by the detector via the second changeover switch. By switching both changeover switches, the microwave signal from the oscillator is amplified by the amplifier and sent to the antenna via the second changeover switch and the transmitter/receiver unit. It is configured to be a transmission signal for adjustment.

[Industrial application field]

The present invention relates to a transmitting/receiving device for antenna direction adjustment, and more particularly to a device for adjusting the direction of each antenna while receiving microwave transmission signals from antennas installed at two locations.

Microwave antennas (parabolic antennas) are usually
Between two points with good line of sight (for example, approximately 5
However, since the direction of each antenna has a large effect on reception sensitivity, the direction of the antenna must be adjusted accurately.

[Conventional technology]

FIG. 4 shows a conventional antenna direction adjustment transmitting/receiving device, which is installed at two locations as shown in FIG.
1 is the transmitter! (Tx), the other device 22 becomes the receiving device W (RX), and the device 21 has an antenna 23,
An antenna 24 is provided in each of the mounting W22.

Devices 21 and 22 each incorporate both a receiver and a transmitter shown in FIGS. 21(b) and 23(c), respectively. After passing the high frequency signal from the antenna 24 of the device 22, that is, the microwave signal, received from the band pass filter 31, a low noise amplifier (LNA) 3 such as a FET amplifier is passed.
2 and sends it to mixer 33. The mixer 33 mixes the input signal with the oscillation signal from the local oscillator 34 and converts it into an intermediate frequency band signal.
After amplifying the received signal, a microwave square detector 36 demodulates it, and a meter 37 displays the strength of the received signal.

In addition, in the transmitter shown in FIG.
generates an intermediate frequency signal, and after this signal is amplified by an intermediate frequency amplifier 42, it is mixed with a signal from a local oscillator 44 by a mixer 43, converted to a microwave signal, and then converted to a microwave signal by a high power amplifier (HPA) 45 to generate a high power signal. The signal is amplified into a signal wave and transmitted to the antenna 24 of the device 22 via the bandpass filter 46 and the antenna 23.

Then, each operator of W21.22 monitors the deflection of his own meter 37 and instructs the other device in the direction in which to adjust the antenna through another conversation route shown in FIG. Determine the desired antenna orientation for each device.

[Problem to be solved by the invention]

However, in the case of such a conventional antenna direction adjustment transmitting/receiving device, each device must be separately provided with both a receiver and a transmitter as shown in Fig. 4(a) and Φ), which is a large-scale installation. There was a problem with it becoming a thing.

- Therefore, an object of the present invention is to realize a transmitting/receiving device for antenna direction adjustment that is as small as possible.

[Means to solve the problem]

In order to achieve the above object, the antenna direction adjustment transmitting/receiving device of the present invention includes a microwave signal transmitting/receiving duplexer section 1, a microwave oscillator 2, as shown in principle in FIG. , a low-noise/high-power amplifier for microwaves 3, a detector for microwaves 4, and a first amplifier for microwaves.
and a second changeover switch 5.6. Then, after the received signal from the transmitter/receiver unit 1 is amplified by the amplifier 3 via the first changeover switch 5, it is sent to the detector 4 via the second changeover switch 5 for reception for antenna direction adjustment. In addition to generating output, both selector switches 5.6
By switching the oscillator 3, the microwave signal from the oscillator 3 is amplified by the amplifier 3 and sent through the second selector switch 6 and the transmitter/receiver unit 1 as a transmission signal for antenna adjustment.

[For production]

In the antenna direction adjustment transmitting/receiving device shown in FIG. 1, when first receiving the antenna direction adjustment signal sent from the other party's device, the first changeover switch 5 and the second changeover switch 6 are moved to the position indicated by the solid line. The microwave signal received by the transmitter/receiver unit l enters the amplifier 3 via the first changeover switch 5. Since this amplifier 3 is a low-noise, high-power type amplifier, it amplifies the received microwave signal with low noise, passes through the second changeover switch 4, and deconverts it by the detector 4, thereby generating a reception output.

On the other hand, when transmitting the antenna direction adjustment signal, the first and second changeover switches 5 and 6 are switched to the dotted line positions shown in the figure. As a result, a microwave signal (for example, a carrier wave) from the microwave oscillator 2 passes through the first changeover switch 5, is amplified with high power by the amplifier 3, passes through the second changeover switch 6, passes through the transmitter/receiver unit 1, and then passes through the microwave It is sent to the other party's device as a transmission signal for antenna direction adjustment with a large wave power.

In this way, direct microwaves are used to adjust the direction of the antenna without converting between the microwave and intermediate frequency, and the transmitter/receiver unit and microwave amplifier can be shared for both reception and transmission by means of a changeover switch. We are trying to simplify the structure.

〔Example〕

FIG. 2 shows an embodiment of the transmitting/receiving device for antenna direction adjustment according to the present invention, which is shown in principle in FIG. 11 and a transmitting tuner 12,
Switching between transmission and reception is performed by the circulator 13, and a third changeover switch 14 is used to switch between the dummy load 15 and the transmission side to prevent reflection of the received signal.

In this transmitter/receiver unit 1, an antenna 16 for reception and an antenna 17 for transmission are provided separately.

Furthermore, the switching control of the first to third changeover switches 5.6.14 is performed all at once by, for example, the control unit 18 that receives a manual switching signal. Further, a meter 19 is connected to the output of the wave detector 4 as in the conventional example.

Next, the operation of such an embodiment will be explained.

First, at the time of reception, a switching signal is sent to the control unit 18, so that the changeover switches 5, 6, and 14 are respectively switched to the solid line positions shown in the figure. and a similar device on the other side (
When a microwave carrier signal (not shown) is sent as a microwave signal and received by the antenna 16, the carrier signal extracted by the tuner 11 tuned to this microwave frequency is transferred to a dummy load by the changeover switch 14. 1
The signal passes through the circulator 13 connected to the switch 5, and is sent to the amplifier 3 through the changeover switch 5. In this amplifier 3, the received signal is amplified with low noise, and then sent to a detector 4 via a changeover switch 6, where it is square-law detected and a demodulated signal is displayed on a meter 19.

In this case, the amplifier 3 is composed of a low-noise amplifier 3a and a high-power amplifier 3b, as shown in FIG. The power amplifier 3b has a gain G2 and a noise figure N F t
, the noise from the input I gastric N F
r is 1, and the second term on the right side is a small value, so it is NF.

It can be seen that the noise figure NF2 caused by the second-stage high power amplifier 3b is hardly visible in the figure, and it can be seen that high power amplification has almost no adverse effect on low noise amplification.

Further, at the time of transmission, the control unit 18 switches the changeover switch 5.6.14 to the dotted line shown in the figure according to the changeover signal. As a result, the carrier wave signal from the oscillator 2 is input to the amplifier 3 via the changeover switch 5 and is amplified by a large amount of power, and then sent from the circulator 13 to the changeover switch 14 via the changeover switch 6. At this time, since the changeover switch 14 connects the circulator 13 and tuner 12, the carrier signal is sent out from the antenna 17 and sent to a similar device on the other side.

In this embodiment, as in the conventional example, the proper direction of each other's antennas is searched for by another conversation route while observing the swing of the meter 19.

In this way, in the above embodiment, one device serves as both a receiver and a transmitter to adjust the direction of the antenna.

Incidentally, in the above embodiment, each changeover switch is changed over by a changeover signal from the control section, but each switch may be changed over manually. Furthermore, when switching the changeover switch, if the switching signals of the control units are given in exactly the opposite manner between opposing devices, the antenna direction can be adjusted without requiring a special conversation route.

〔Effect of the invention〕

As described above, according to the transmitting/receiving device for antenna direction adjustment of the present invention, the received signal from the transmitting/receiving duplexer section is amplified by the low noise/high power amplifier via the first changeover switch, and then the second changeover switch is performed. A receiving output for antenna direction adjustment is generated from the detector via the switch, and by switching both changeover switches, the microwave signal from the microwave oscillator is amplified by the amplifier, and the second changeover switch and the transmitting/receiving output are amplified by the amplifier. Since it is configured to be sent as a transmission signal for antenna adjustment via the duplexer section, it is much smaller than when the receiver and transmitter are provided separately.
■Since there is no conversion between microwave and intermediate frequency, it is also compact, and ■If you decide the timetable in advance between the opposing devices or control the switching of the changeover switch, you can talk alternately. Effects such as being able to adjust the direction of the antenna without having to do so can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a principle block diagram of a transmitting/receiving device for antenna direction adjustment according to the present invention, Fig. 2 is a circuit diagram showing an embodiment of the transmitting/receiving device for antenna direction adjustment according to the present invention, and Fig. 3 is a low noise/high noise FIG. 4 is a diagram for explaining the noise figure of a power amplifier. FIG. 4 is a diagram for explaining a conventional example. In FIG. 1, l... transmitter/receiver unit, 2... microwave oscillator, 3... low noise/high power amplifier, 4... detector,

Claims (1)

[Claims] A microwave signal transmitter/receiver unit (1), a microwave oscillator (2), a microwave low-noise/high-power amplifier (3), and a microwave detector (4), and first and second microwave selector switches (5) and (6), and the received signal from the transmitter/receiver unit (1) is transferred to the first selector switch (5). After being amplified by the amplifier (3) through the detector (4), a reception output for antenna direction adjustment is generated from the detector (4) through the second changeover switch (6), and both changeover switches (5) (6) ), the microwave signal from the oscillator (3) is amplified by the amplifier (3) and transmitted through the second selector switch (6) and the transmitting/receiving duplexer section (1). A transmitting/receiving device for adjusting antenna direction, characterized in that the transmitting signal is a transmitting signal.