JPH02149103A - Two-element phase feed frame type antenna - Google Patents

Abstract

PURPOSE:To obtain a two-element phase feed frame type antenna with simple structure and superior durability by forming a radiator and a reflector in triangular frame shape, respectively, and connecting them mechanically by connecting respective apex of the radiator and the reflector at the apex of a supporting strut. CONSTITUTION:The supporting circuit 1, and the radiators 7 and 8 and the reflectors 6 and 9 consisting of at least a pair of covered copper wires mounted on a pipe made of aluminum are provided. And the radiators 7 and 8 and the reflectors 6 and 9 are formed in the triangular frame shape, respectively, and also, the pairs of radiators 7, 8 and reflectors 6, 10 are connected mechanically with each other by connecting the apexes of them at the apex part of the supporting strut 1. In such a way, the two-element phase feed frame type antenna with simple structure and durability can be obtained. Also, it is possible to double a main without impairing the durability in structure by comprising two pairs of radiators and reflectors in triangular frame shape vertically.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a two-element phase-fed frame antenna.

<Prior Art> Conventionally, a so-called Swiss quad antenna, as schematically shown in a perspective view in FIG. 6, has been known as a two-element phase feeding frame type antenna.

In FIG. 6, 16 is a support column, 17 is a boom fixedly attached to the support column 16, 18.19 is an aluminum pipe attached to the upper end of the first boom of the boom at right angles to each other, and 20.21 is a boom fixedly attached to the support column 16. Aluminum pipes 22, 23, 2 are installed perpendicularly to each other at the lower end of the boom 17, respectively.
4.25 indicates a coated copper wire stretched between the ends of the upper aluminum pipes I8 and 19 and the ends of the lower aluminum pipes 20 and 21, respectively. Aluminum pipe 18
．． 19 and 20.21 both have the same shape, and as is clear from the figure, the linear portion 18-1.1 has a long dimension.
9-1.20-1.21-1 is located at the rear and together with the coated copper wire 22.25 constitutes a reflector, while the short straight sections 18-2.19-2.20-2. 21-2 is located at the front and forms a radiator together with coated copper wires 23 and 24.

<Problems to be Solved by the Invention> The Swiss quad antenna allows the distance between the radiator and reflector to be set to a relatively narrow value (for example, 0.1 to 0.075λ), and the gain can be set to a relatively large value. (e.g. 10dB)
It has the following advantages.

However, the Swiss quad antenna has the following problems.

That is, ■ aluminum vibrator 18.
19, a special connecting member is required; ■ Both ends of the upper aluminum vibrator 18, 19 bend downward due to their own weight or the tension of the coated copper wires 22, 23, 24, 25. The characteristics of the antenna tend to change; and (1) the task of assembling the antenna to match a predetermined resonance frequency and then adjusting the antenna to match another resonance frequency becomes complicated.

Means for Solving the Problems It is an object of the present invention to solve the problems of the Swiss quad antenna as described above, and particularly to provide a three-element phase-fed frame-shaped antenna having a simple and robust structure.

Therefore, the three-element phase-fed frame type antenna of the present invention includes a support column and at least one pair of radiator and reflector attached to the support column, in which each radiator and reflector are connected to each other. Each of the radiators and reflectors is formed into a triangular frame shape, and the apexes of the pair of radiators and reflectors are mechanically connected to each other at the top of the support column.

<Embodiment> Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being an overall perspective view, Figure 2 being an exploded perspective view of the connecting member shown at the bottom of Figure 1, and Figure 3 being an exploded perspective view of the connecting member shown at the bottom of Figure 1. 1A and 1B show perspective views of other connecting members shown in the upper part of FIG. 1, respectively.

In FIGS. 1 to 3, 1 is a supporting column, 2 is a connecting member that connects the supporting column 1 and the aluminum vibe 3.4, 5 is another connecting member fixed to the top of the supporting column 1, 6,
7, 8.9 each represent a coated copper wire stretched between the end of the aluminum vibrator 3.4 and the other connecting member 5.

As shown in FIG.
, consisting of an aluminum vibrator grip part 2-2.2-3.

The support pillow holding part 2-1 has a hollow cylinder 2-1a having a diameter larger than that of the support column 1, and screw holes 2-1b and 2-1b bored in the hollow cylinder 2-18. a thumbscrew 2-1c that is fitted together and clamps the support column 1 with the inner circumferential surface of the hollow cylinder 2-1a;
2-1c, the support column 1 is passed through the hollow cylinder 2-18, and the thumb screw 2-1c is attached.
1c.

2-1c is screwed into the screw holes 2-1b, 2-1b, and the support column 1 is held between the tips of the thumb screws 2-1c, 2-1c and the inner peripheral surface of the hollow cylinder 2-1a.

The aluminum vibrator grip part 2-2 is a half-split pipe 2- which is attached to the cylinder 2-18 of the support pillow grip part 2-1 by welding or the like.
2a, and the thumbscrew 2--2 for the half-split vibrator 2-28.
b, and another half pipe 2-2c of smaller size engaged by 2-2b. The half-split vibrator 2-2a has a semi-cylindrical portion 2 having an inner diameter slightly smaller than the diameter of the aluminum vibrator 4.
-2a-1, screw holes 2-2a-2, 2-2a-2 protruding from the end surface of the semi-cylindrical portion 2-2a-1 and into which thumb screws 2-2b, 2-2b are screwed; 2-2a-22-2a-
2-2a-3゜2-2a-3,2-
It consists of 2a-3 and 2-2a-3. Other half-split vibe 2
-2c is the semi-cylindrical part 2-2a- of the half pipe 2-2a.
The other semi-cylindrical part 2-2 cm has an inner diameter approximately equal to the radius of 1.
1, and another screw hole 2- protruding from the end face of the semi-cylindrical portion 2-2cm1 and into which thumb screws 2-2b, 2-2b are screwed.
Another engaging tongue piece 2-2c having a size of 2cm2.2-2cm2
It consists of m3.2-2cm3. In order to grip the aluminum vibrator 4, the aluminum vibrator 4 is brought into contact with the inner peripheral surface of the semi-cylindrical portion 2-2a-1 of the half-split vibe 2-2a, and the other half-split vibe 2-2C is held. The engaging tongue piece 2-2
cm3.2-2cm3 is positioned so that it faces the engaging tongue pieces 2-2a-3, 2-2a-3 of the half pipe 2-2a, and the thumbscrews 2-2b, 2-2b are inserted into the engaging tongue piece 2. -2cm3.
2-2cm3.2-2a-3, 2-2a-3 screw hole 2
-2cm2. 2-2cm2. 2-2a-2, 2-2
Screw it into a-2.

The other aluminum vibrator gripping part 2-3 is the half pipe 2-2a and the support branch clamping part 2 of the aluminum vibrator gripping part 2-2.
It consists of a half-split vibrator 2-3a fixed to the cylinder 2-18 of -1 by welding or the like, and a thumbscrew and other half-split vibrators (not shown). The aluminum vibrator gripping part 2-3 grips the aluminum vibrator 3 perpendicularly to another aluminum vibrator 4, and each component is the same as that of the aluminum vibe gripping part 2-2 described above.

The other connecting member 5 is a support punch attachment part 5 that is crimped to the support column 1.
-1 and a coated copper wire connection part 5-2 that mechanically connects the coated copper wires 6, 7, 8, and 9. The support punch attachment part 5-1 is a hollow cylindrical part 5-1 having an inner diameter smaller than the diameter of the support column 1.
8, and engaging tongue pieces 5-1b, 5-1b extending from the free end of the hollow cylindrical portion 5-18.
b and 5-1b are screwed together with the screw 5-3, thereby being crimped to the support column 1. The coated copper wire connection part 5-2 is provided to protrude from a part of the hollow cylindrical part 5-1a of the support punch attachment part 5-1, and connects the coated copper wires 67, 8, and 9 to each other by screws 5-4. .

In the aluminum vibrator 3, a short linear portion 3-1 is located at the front, and a long linear portion 3-2 is located at the rear.

In addition, the other aluminum vibrator 4 has a short straight part 4-
1 is located at the front, and the long straight section 4-2 is located at the rear. A radiator is constituted by the straight part 3-1 of the aluminum vibrator 3, the straight part 4-1 of the other aluminum vibrator 4, and the coated copper wire 7.8, while the straight part 3 of the aluminum vibrator 3 -2, the straight portion 4-2 of the other aluminum vibrator 4, and the coated copper wire 6.9 constitute a reflector.

In the aluminum vibrator 3.4, the straight part 3-1.4-1 may have the same dimensions as the other straight part 3-2.4-2. In this case, the grip part 2-2.2-3 and By adjusting the contact point of the vibrator, a reflector and a radiator similar to the reflector and radiator shown in FIG. 1 can be constructed.

For example, in the case of 30MHz, the dimensions of the radiator are approximately 1
0.92m, base approximately 3.47m, hypotenuse approximately 3.72
Set to 2m. On the other hand, the dimensions of the reflector are approximately 11
．． 48m, base approximately 3.85m, hypotenuse approximately 3.815
Set to m. The distance between the radiator and reflector is approximately 1
．． Set to 2m.

In addition, each dimension is determined according to the predetermined resonance frequency,
If it becomes necessary to change the resonant frequency after assembling the antenna, use thumbscrews 2-1c and 2-tc.
Loosen and rotate the support column 1 to remove the coated copper wires 6, 7, 8.
．． 9 is a coated copper wire 6, 7, 8 wrapped around the top of the support column 1.
．． When the dimension of 9 becomes short and corresponds to the desired resonant frequency with a short wavelength, the thumbscrews 2-1c and 2-
1c and clamp the support column 1 again.

Next, a second embodiment of the present invention will be described.

The second embodiment has a structure different from that of the first embodiment in the vicinity of the top of the support column 1, and the rest has the same structure as the first embodiment. That is, as shown in FIG. 4, the coated copper wires 6, 7, 8.9 are mechanically connected by appropriate connecting means, and this connecting portion passes through the hollow interior 1a of the support column 1 and reaches the lower end 16. The structure is such that people can enter the hollow interior 1a of the support column 1 via the wire 1G. Therefore, wire 10
By adjusting vertically, the dimensions of the coated copper wires 6, 7, 8°9 can be easily adjusted.

Next, a third embodiment will be described.

As shown in FIG. 5, this embodiment has a structure in which two antennas of the first embodiment are provided vertically symmetrically. In FIG. 5, 11, 12, 13, and 14 represent newly added coated copper wires, 15 represents a connecting member, and other symbols represent the same contents as those in FIG. 1. Covered copper wires 11, 12, 13.14 are stretched between each end of the aluminum vibe 3.4 and the connecting member 15, respectively. 1. The connecting member 15 is constructed in the same manner as the connecting member 5 of the first embodiment, except that it includes coated copper wires 11, 12, 13.
．． 14 is mechanically connected below the support column 1.

Although not shown, there is another means for adjusting the lengths of the coated copper wires 6, 7, 8°9.
Possible methods include fitting from above 7, 8, and 9.

Furthermore, the antenna shown in FIG. 5 may be placed horizontally to accommodate vertically polarized waves.

<Operations and Effects of the Invention> As explained above, according to the present invention, the radiator and the reflector are each formed into a triangular frame shape, and the apexes of the radiator and the reflector are mechanically connected to each other at the apex of the support material. Since it is connected to □, it is possible to realize a two-element phase feed frame type antenna with a simple and robust structure.

Furthermore, by making the support column rotatable, it becomes easier to vary the resonance frequency.

In addition, if the triangular frame-shaped radiator and reflector are configured as two pairs as shown in Figure 5, the gain can be increased to 2 without impairing the robustness of the structure.
It is possible to double the amount.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one embodiment of the present invention, FIG. 2 is an exploded perspective view of a connecting member thereof, FIG. 3 is a perspective view of another connecting member shown in FIG. 1, and FIG. 4 is a perspective view of an embodiment of the present invention. FIG. 5 is a perspective view of a third embodiment of the present invention, and FIG. 6 is a schematic perspective view of a conventional Swiss quad antenna. DESCRIPTION OF SYMBOLS 1...Support column, 2...Connection member, 3.4...Aluminum vibe, 5...Other connection members, 6.7, 8.9...Coated copper wire, 3-1 .4-1.7.13...Radiator, 3-2.4-
2.6.9...Reflector. Patent Applicant Shinshirasago Electric Co., Ltd. Figure 2 Ward Figure 2

Claims (1)

[Scope of Claims] A two-element phase-fed frame type antenna comprising a support column and at least a pair of radiators and reflectors attached to the support column, in which each radiator and reflector are each formed into a triangular frame shape, and . A two-element phase-fed frame type antenna, characterized in that the vertexes of a pair of radiators and reflectors are mechanically connected to each other at the top of the support column.