JPS6312579Y2 - - Google Patents

Description

[Detailed description of the invention] In this invention, a metal strip conductor of an arbitrary shape is formed by etching on one side of a sanderch plate, which has a thin dielectric film coated on both sides of a dielectric core. This invention relates to improvements in a microstrip antenna constructed by coating a conductive ground conductor on the surface of the conductor, inserting the center conductor of a coaxial connector into a sanderch plate from the side of the conductive ground conductor, and connecting it to a metal strip conductor. It is something.

The first conventional microstrip antenna
There is one shown in the figure. Further, FIG. 2 shows its cross-sectional structure.

In Figures 1 and 2, 1 is a strip conductor that radiates electromagnetic energy accumulated in the resonance state of the electromagnetic field, 2 is a dielectric film, 3 is a dielectric core, 4 is a conductive ground conductor, and 5 is a microstripe. The outer conductor flange of the coaxial connector that feeds power to the strip antenna, 6 the center conductor of the coaxial connector, 7 the dielectric that insulates the conductive ground conductor 4 and the center conductor 6, 8 the strip conductor 1 and the center conductor 6 A solder 9 electrically and mechanically connects the conductive ground conductor 4 and the connector flange 5.

Next, the operation will be explained. At a certain frequency, the electromagnetic field propagating between the outer conductor and the center conductor 6 of the coaxial connector generates a constant number in the space between the strip conductor 1 and the conductive ground conductor 4. 4 constitutes an open resonator.

In this resonant state, the electric field at the end of the strip conductor 1 is radiated toward the space on the side where the dielectric is not present due to the asymmetry of the space on the opposite side of the strip conductor to the side where the dielectric is present, and is radiated toward the antenna. It works as.

The conventional microstrip antenna has a conductive ground conductor 4 and a coaxial connector flange 5 as described above.
Electrical and mechanical connections were made with solder 9, but if the antenna is used in a harsh environment such as a space environment, there is a possibility that the soldered part may be mechanically destroyed. However, it had the disadvantage of low reliability both electrically and mechanically. Further, when a non-metal conductive ground conductor is used, soldering is not possible, and when a conductive adhesive is used as a substitute for solder, reliability is further reduced.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional microstrip antenna, and instead of connecting the conductive ground conductor 4 and the connector flange 5 using solder 9, 4
A screw hole is provided in the metal plate 11 adhered to the dielectric core side of the dielectric film 2 on which the coaxial connector flange 5 and the conductive ground conductor 4 are tightened and crimped using the metal plate 11 and the screws 10. The aim is to create a microstrip with high mechanical and electrical reliability.

An embodiment of this invention will be described below with reference to the drawings. Fig. 3 is a cross-sectional side view of a microstrip antenna showing an embodiment of this invention, and Fig. 4 is a cross-sectional perspective view thereof. This is the same symbol as the antenna. 10 is a screw, 11 is a metal plate, which has a hole in the center for passing the center conductor and dielectric of the connector, and a screw hole around the periphery that matches the hole position of the coaxial connector flange.
The dielectric film 2 on which the conductive ground conductor 4 is attached and the flange 5 are tightened and crimped by screws 10.
Therefore, the connection between the conductive ground conductor 4 and the flange 5 has sufficient mechanical strength and is electrically secure, and has sufficient reliability as an antenna for aviation, space, etc.

Since the dielectric film 2 covered with the conductive ground conductor 4 and the flange 5 of the connector are directly crimped using the screws 10 and the metal plate 11, the mechanical strength is not reliable with conventional solder connections. This drawback could be removed.

Furthermore, if the metal plate 11 is bonded to the dielectric film 2 covered with the conductive ground conductor 4, a sanderch plate is formed, and then the coaxial connector is attached with the screws 10, the center conductor 6 and the strip conductor 1 Since all that is required is soldering, the process is simple and quality variations can be reduced.

In the above embodiment, a sandwich plate in which the dielectric film 2 is coated on both sides of the dielectric core 3 is described, but the dielectric film 2 on the side on which the conductive ground conductor 4 is coated is removed, and the The same effect as described above can be obtained even when the present invention is used in a microstrip antenna using a sandwich plate formed of a ground conductor 4 and one dielectric film 2.

As described above, according to this invention, since the conductive ground conductor 4 and the flange 5 of the coaxial connector are directly crimped using the screw 10 and the metal plate 11, the mechanical strength is high and the electrical connection is also highly reliable. This has the effect of reducing the variation in quality.

In addition, although this invention has been explained regarding the power feeding method for antenna elements, in an array antenna in which multiple antenna elements are lined up, if the array antenna is powered by a microstripline, the connection method between the microstripline and the coaxial connector is Needless to say, it can also be applied in the same way.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a microstrip antenna, Fig. 2 is a cross-sectional side view showing the power feeding part of a conventional microstrip antenna, and Fig. 3 is a cross-sectional side view showing the configuration of an embodiment of this invention. , FIG. 4 is a sectional perspective view thereof. In the figure, 1 is a strip conductor, 2 is a dielectric film, 3 is a dielectric core, 4 is a conductive ground conductor, 5 is a connector flange, 6 is a connector center conductor, 7 is a dielectric, 8 is solder, 9 is solder , 10 is a screw, 1
1 indicates a metal plate, respectively.

Claims (1)

[Scope of utility model registration request] A metal strip conductor of an arbitrary shape is formed by etching on one side of a sandwich plate with a thin dielectric film coated on both sides of the dielectric core, and a conductive ground conductor is coated on the other side of the sandwich plate. However, in a microstrip antenna constructed by inserting the center conductor of a coaxial connector into a sandwich plate and connecting it to a metal strip conductor from the conductive conductor side, the dielectric of the dielectric film covered with the conductive ground conductor is A microstrip antenna characterized in that a metal plate with screw holes is glued to the body core side, and a coaxial connector flange and a conductive ground conductor are tightened and crimped using this metal plate and screws.