JPS5862902A - Printed dipole antenna - Google Patents

Abstract

PURPOSE:To simplify the constitution and to decrease the occupied area, by printing two dipoles on a dielectric substance board, twisting the dipoles and making them orthogonal with each other. CONSTITUTION:Dipoles 14a, 14b, 15a, 15b, parallel two-lines 16a, 16b and 17a, 17b, tapered baluns 18, 19, a ground conductor 20, and inner conductor 21, 22 are printed on the front and rear side of a dielectric substance board 13 having notches near the parallel two-lines 16a, 16b and 17a, 17b. Twisted parts B1, B2 are provided for the notches, and the dipoles 14a, 14b and 15a, 15b are tilted by 45 deg. each and they are made orthogonal with each other. Orthogonal electric field components E1, E2 of electromagnetic waves incoming from the direction A can be received at the dipoles 14a, 14b and 15a, 15b and its reception current can be obtained from coaxial plugs 23 and 24. Further, the same result can be obtained when the dipoles are twisted in an arbitrary angle.

Description

DETAILED DESCRIPTION OF THE INVENTION Jin's invention relates to a printed dipole antenna constructed using a dielectric substrate.

Here, for convenience of explanation, the shape of the radiation part of the dipole antenna is assumed to be a rectangular plate, and a case will be described in which two dipoles are orthogonally crossed.

First, the conventional printed dipole antenna shown in FIG. 1 will be explained.

FIG. 1 is a structural diagram of a conventional printed dipole antenna. 1st j! fl in i1), 121 is a dielectric plate, (31) and (sb), (4m) and (4b) are Daibo "* (s") and (5b)
, , (61) and (6b> are two lines of Tei row, (7),
(81 is a Theba type balun.

(9g), (10b) is the center □-core conductor, (9b)
, (10b) wlIpI # □ body, α fraud, circle are coaxial □ plugs. There are dipoles (
e) and (3b), parallel 2II (5a) and (5b
), the Taber-shaped balun (7), the center conductor (9), and the ground conductor (9b) are printed to form an integrated structure. The same is true even if there are two dielectric plates (2), and one dielectric plate (1
1 and (21) are arranged orthogonally to each other.

Now, suppose the electric field component E is perpendicular to the direction of A.

When a radio wave with E arrives, the electric field component E is received by the dipoles (3a) and (3b). The received current T, passes through the parallel 28 (5a> and (5b)), is converted from a balanced current to an unbalanced current by the Qi conformal rose (7) ) flows into the microstrip line composed of a dipole (4a
) and (4b), receiving current 1.4d parallel 2
The lines (6a) and (6b) l flow into the tapered balun (8), the inner conductor (10a) and the ground conductor (10b), and each received current I,,T, is as an output from the coaxial plug αυ,@ Obtainable. ``Since this printed dibonyl antenna is composed of two orthogonal dielectric substrates, it has a three-dimensional structure and has the disadvantage of increasing the space occupied by the antenna.

In addition, when used as a 9-circularly polarized antenna, it is necessary to provide a separate circularly polarized feeding circuit or to configure it on one board and connect it to the dipole on the other board, making the antenna structure complicated. There was also a manufacturing flaw.

This invention aims to eliminate these drawbacks.

Two dipoles are printed on one substrate, and the dipoles are tilted by 45 degrees so that they are orthogonal to each other.An embodiment of the present invention will be described below with reference to the drawings.

2 and 3 are diagrams showing the structure of a printed dipole antenna according to the present invention.

At the second cape, a3 is a dielectric plate, (14g), (
14b).

(15a) and (15b) are dipoles, (16=
), (llb) l ('1'7a) + (17b) is two parallel lines, (lit), '(19 is a tapered paran, Dake is a ground conductor, all, @ is an inner conductor, a3. (2) FIG. 3 is a top view seen from direction A in FIG. 2.

Dipole (t4g), (Ub), (lsa),
(1sb), parallel 2# (16a), (16b),
(17g), (17b), f-P type balun αS, α
l, ground conductor ■, inner conductor (sha), @ is two parallel lines (16a)
, (16b), (17a), and (17b) are printed on the front and back sides of the dielectric plate α314, which has cutouts near it. As shown in Figure 3, the twist part Bl
, Bl are provided, and plate dipoles (14a) and (14
b), (15a) and (15b,) are configured such that they are tilted by 45 degrees and are orthogonal to each other. A radio wave with 7 orthogonal electric field components E, ,E, arriving from the direction of a person, divides each component into a dipole (14m,') and (1
4b), (15a) and (4sb), and their received currents can be obtained as outputs from the coaxial plugs (c) and 4sb.

This method has the advantage that the tapered curved balun [L OL $''?microstrip line conductor m1. .

, FIG. 4 shows another embodiment of this invention! In a complete picture, Q
:l is dielectric, , (14m), ,Q4b), , <
15g), ,<15. C) to - is die, bo/' p,,, (1,"-), (i 6
b)-(i7ri=, (iWb) is two parallel lines, side, α- is a tapered balun, an is a ground conductor, (211,
02B is the inner conductor, @! 6.90' phase difference 2 splitter, ma
The pivot valve, B,, B, is the twisted part.

With this antenna, 9 yen arrives from the dA direction! radio waves,
When received through a 90° phase difference two-way distributor (to), a signal of 7 is obtained, and its reception output can be obtained from the -axis connector (to). In this case as well, a printed dipole antenna for circularly polarized waves is used, which has the advantage of occupying less space and having a single-unit structure, similar to the antennas shown in FIGS. 2 and 3.

Although the above description has been made for the case where the two dipoles are perpendicular to each other, the same method can be applied even when one or more dipoles are twisted at any angle. In addition, the same method can be used when the dipole and the dipole feed line are printed on one side of a single dielectric substrate, or when the dipole has an arbitrary shape such as a folded shape or a double sector shape. , paid to Sa5! track f
As a power supply circuit) 1J type, rate type q? - It can be carried out at the same time even when using a tritub line.

As explained above, the present invention has great effects in that it is possible to obtain a printed dipole antenna that is easy to manufacture, has a simple structure, and is integrated with a feeding circuit.

[Brief explanation of the drawing]

Fig. 1 is a structural diagram of a conventional printed dipole antenna, Fig. 2 is a structural diagram of a printed dipole antenna according to the present invention, Fig. 3 is a top view, and Fig. 4 is a structure showing another embodiment of the present invention. It is a diagram. In the figure, (11, (21, (31) is a dielectric plate, (3
a) and (3b), (4m) and (4b), (
14a) and (t4b). (1sa) and (15b) are dipoles, (9a
), (xoa). elf), 12ati inner conductor, (9b), (1
0b) TMD ground conductor, bad is 90° phase difference 2 distributor, B,
,B is the twist part. It should be noted that the same or corresponding parts in FIG. 1 are denoted by the same reference numerals. @Figure 1

Claims (1)

[Scope of Claims] (1) Gui on one side or both sides of one dielectric substrate,
-Yaoyoga, I', -2 salary 1. □ In the printed dipole antenna which is made into a dipole and a doublet, a twisted part is provided in a part of the dielectric substrate, and the dielectric substrate part on which the dipole is printed and 2. A printed dipole antenna characterized in that a dielectric substrate portion on which the dipole feed line is printed, except for the twist υ portion, is not on the same plane. (21) Printing according to claim 111, characterized in that a plurality of dipoles, a dipole feed line, and a feed circuit connected to the dipole feed line are printed on a single dielectric substrate. Dipole antenna. (3) The printed dipole antenna according to claim (1), characterized in that a plurality of die balls are arranged orthogonally to each other.