JPH02147907U - - Google Patents

Description

[Brief explanation of drawings]

Figures 1 a, b and c are diagrams showing one embodiment of this invention, Figure 2 is an enlarged view of the connection between the metal ring 9 and the center conductor 5 of the coaxial line 4, and Figure 3 is a diagram showing the connection between the metal ring 9 and the central conductor 5 of the coaxial line 4. A diagram showing the resonant frequency and return loss characteristics of a one-end short-circuited microstrip antenna. Figures 4a and b are diagrams showing an example of a conventional one-end shorted microstrip antenna. Figure 5 is a conventional one-end microstrip antenna. FIG. 3 is a diagram showing the characteristics of the resonant frequency and return loss of a short-circuited microstrip antenna. In the figure, 1 is a radiation conductor element, 2 is a dielectric substrate, and 3
is the ground conductor plate, 4 is the coaxial line, 5 is the center conductor, 6
is the feeding point, 7 is the open peripheral end, 8 is the shorted peripheral end, 9
is a metal ring. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A radiation conductor element with a plane circuit short-circuited at one end to a grounded conductor plate is provided on a dielectric substrate that is thinner than the wavelength, and a coaxial line for power supply is provided on the back of the opposing grounded conductor plate. In a short-circuited microstrip antenna, the connection between the planar circuit and the center conductor of the coaxial line is strengthened by attaching a metal ring that is used when connecting the center conductor of the coaxial line for power feeding and the planar circuit. A microstrip antenna with one end shorted.