JPH0342725Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] The present invention relates to an improvement of a distributed constant electromagnetic delay line that can obtain good delay characteristics in an ultra-high frequency band. [Prior Art] This type of distributed constant electromagnetic delay line is constructed by, for example, forming a dielectric layer around the outer periphery of a plate-shaped ground electrode, and forming a plurality of turns of a conductor around this dielectric layer in the form of a single-layer solenoid. Some have a space-wound configuration. After studying this kind of distributed constant electromagnetic delay line, the inventor found that there is room for further improvements in order to ensure good delay characteristics and to reduce size and cost. Ta. [Problems to be solved by the invention] The present invention was made under these circumstances, and aims to provide a distributed constant electromagnetic delay line that is small, inexpensive, and has good delay characteristics in the ultra-high frequency band. purpose. [Means for solving the problem] In order to solve this problem, the present invention space-wraps a conductor in a single-layer solenoid shape with multiple turns of a width dimension W and a sufficiently small thickness dimension T at a predetermined pitch P. This is a distributed constant electromagnetic delay line in which a flat inductance element is formed, and a ground electrode is arranged opposite to the conductor through a dielectric layer, and each turn advances approximately half a turn and its width dimension W side. The position of the conductor located at is advanced by more than 0.5 pitch in the axial direction of the inductance element, and the conductor is wound at an angle in the axial direction of the inductance element. [Function] According to the configuration of the present invention, the position of the conductor advanced by approximately half a turn in each turn is advanced by more than 0.5 pitch in the axial direction of the inductance element, so that the conductor can be formed into an inductance element. Regarding positive and negative coupling occurring between conductors, the influence of negative coupling occurring between distant conductors is relatively stronger than the positive coupling occurring between adjacent conductors. [Example] The details of the present invention will be explained below. 1 and 2 are a front view and a side view showing an embodiment of a distributed constant electromagnetic delay line according to the present invention. In both figures, a fluorine resin layer 3 is formed as a dielectric layer on the outer periphery of an elongated plate-shaped earth electrode 1, and the width direction dimension W (hereinafter referred to as W) becomes the thickness direction dimension T (hereinafter referred to as T). In contrast, a sufficiently large flat and elongated bobbin 5 is formed. On the outer periphery of this bobbin 5, a conductor strip 7 is arranged at a pitch P.
The inductance element 9 is formed by space-winding a plurality of turns in the shape of a single-layer solenoid, and the distributed constant type An electromagnetic delay line is configured. The symbols W and T in the figure are exactly the distances between the centers of the conductor strips 7 facing each other with the bobbin 5 in between, and the conductor strips 7 are perpendicular to the longitudinal direction of the inductance element 9 on both W sides, and parallel to each other. is formed. The conductor strip 7 of the inductance element 9 is
Each conductor strip 7 located on one W side (top side in the figure)
Each conductor strip 7b (lower surface side in the drawing), which has advanced approximately half a turn from a, is arranged at a position that has advanced 0.5 pitch+B from each conductor strip 7a in the axial direction of the inductance element 9. That is, within the turn of each conductor strip 7, the conductor strips 7a and 7b facing each other with the bobbin 5 in between are shifted by 0.5 pitch +B in the axial direction of the inductance element 9. In other words, the conductor strip 7 is wound at an angle in the axial direction of the inductance element 9 so that the half-turn pitch is larger than half of the winding pitch P of the flat inductance element 9. The distributed constant electromagnetic delay line configured in this manner has the advantages described below and can obtain good delay characteristics by appropriately selecting the value of B described above. The inventor of the present invention has proposed a fluorine resin layer 3 with a thickness of 0.7 mm on the outer periphery of a ground electrode 1 with a thickness of 0.07 mm and a width of 15 mm for the distributed constant type electromagnetic delay line according to the conventional and the present invention.
A conductor strip 7 with a thickness of 0.035 mm and a width of 2 mm is formed on the outer periphery of the inductance element 9 with a pitch of P=3 mm in the form of a single layer solenoid so as to obtain an inductance element 9 with a width of 18 mm.
An experiment was conducted by forming 10 turns and increasing the value of B sequentially from O. Then, the pulse response waveforms shown in FIGS. 3A to 3C are measured, and the delay time (hereinafter referred to as td),
The values shown in the table below were obtained for the rise time (hereinafter referred to as tr) and the characteristic impedance zo (hereinafter referred to as zo).

[Effect of idea]

As explained above, the electromagnetic delay line of the present invention advances by half a turn in each turn with respect to an inductance element in which a conductor is wound flat with a width dimension W and a sufficiently small thickness dimension T.
Since the conductor position on the side is advanced by more than 0.5 pitch in the axial direction of the inductance element and wound diagonally in the axial direction of the inductance element, it has good delay characteristics, is small and inexpensive. It is.

[Brief explanation of the drawing]

1 and 2 are a front view (partially shown in cross section) and a side view showing an embodiment of a distributed constant electromagnetic delay line according to the present invention, and FIGS. 3A to 3C are distributed constant electromagnetic delay lines. FIGS. 4 and 5 are front views (partially shown in section) showing other embodiments of the distributed constant electromagnetic delay line according to the present invention. 1, 19... Earth electrode, 3, 17... Dielectric layer (fluorine resin layer), 5, 11... Bobbin, 7,
13... Conductor (conductor strip), 9, 15... Inductance element.

Claims (1)

[Scope of Claim for Utility Model Registration] A flat inductance element in which a conductor is space-wound in a single-layer solenoid shape with a plurality of turns at a predetermined pitch P, with a width dimension W and a thickness dimension T that is sufficiently smaller than the width dimension W, and a dielectric layer interposed therebetween. In a distributed constant electromagnetic delay line comprising a ground electrode disposed opposite to the conductor, the position of the conductor that is approximately half a turn ahead of each turn and located on the width dimension W side is such that the position of the conductor is located on the width dimension W side of the inductance element. 1. A distributed constant electromagnetic delay line, characterized in that the conductor is wound in an axial direction with a pitch greater than 0.5, and the conductor is wound at an angle in the axial direction.