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Showing papers on "Microstrip antenna published in 1970"


Proceedings ArticleDOI
11 May 1970
TL;DR: In this article, the authors used the well-known singular integral equation approach for deriving an alternate form of eigenvalue equation with superior convergence properties using only a 2x2 matrix equation.
Abstract: Dispersion characteristics of shielded microstrip lines are investigated using a new technique. The method utilizes the well-known singular integral equation approach for deriving an alternate form of eigenvalue equation with superior convergence properties. It is shown that accurate numerical results may be obtained from this eigenvalue equation using only a 2x2 matrix equation. In comparison, the conventional formulation of the problem requires the use of matrices that are much larger in size. Aside from the numerical efficiency, the simplicity of the method makes it possible to conveniently extract higher order modal solutions for the propagation constants that affect the high-frequency application of microstrip lines. Even though the derivation of the determinantal equation requires some intricate mathematical manipulations, the user may bypass these completely and use the final eigenvalue equation which is programmable on the computer.

152 citations



Journal ArticleDOI
TL;DR: In this article, the parameters of coupled microstrip lines are presented, which are required in the equations and results derived in Part I for determining the characteristics of coupled lines, including inductive and capacitive coupling coefficients, effective dielectric constant, and characteristic impedance.
Abstract: This part of the paper presents the parameters of coupled microstrip lines which are required in the equations and results derived in Part I for determining the characteristics of coupled lines. Several geometries are considered and the inductive and capacitive coupling coefficients, the effective dielectric constant, and the characteristic impedance for various dimensions of these geometries are presented.

29 citations


Patent
23 Mar 1970
TL;DR: In this article, a printed circuit board has a plurality of antenna elements etched on one side thereof and a ground plane on the other separated by dielectric material of a predetermined thickness.
Abstract: A method of making an antenna array and an antenna array apparatus of a low-cost wide angle retroreflector is provided in which a printed circuit board has a plurality of antenna elements etched on one side thereof and a ground plane on the other separated by dielectric material of a predetermined thickness. Baluns are attached through the printed circuit board to each antenna element and to the ground plane and transmission lines of equal length connect spaced pairs of antenna elements utilizing the balun and matching the transmission line to the antenna element.

20 citations


Patent
03 Aug 1970
TL;DR: A portable radio device provided with an antenna small sized and not projected from the device for the convenience of handling, which antenna has two polarizations to be made operable almost free from disadvantages in operation due to change in electromagnetic field which are brought about with influences of ambient geographical features or houses as discussed by the authors.
Abstract: A portable radio device provided with an antenna small sized and not projected from the device for the convenience of handling, which antenna has two polarizations to be made operable almost free from disadvantages in operation due to change in electromagnetic field which are brought about with influences of ambient geographical features or houses.

11 citations


Journal ArticleDOI
TL;DR: A class of circuits is described that can be used with a phased-array antenna in order to allow a given array feed system to provide phase control for a phased array with many more elements.
Abstract: A class of circuits is described that can be used with a phased-array antenna in order to allow a given array feed system to provide phase control for a phased array with many more elements Alternatively, certain variations of these circuits can be used alone to provide phase control for small arrays while using only a single phase shifter for each direction of scan

7 citations


Patent
27 Mar 1970
TL;DR: An end-fire antenna having a thick-wall dielectric tube concentrically positioned about the principal axis of a cassegrain antenna and seated on the main reflector functions as a guiding structure for focusing the antenna radiation as discussed by the authors.
Abstract: An end-fire antenna having a thick-wall dielectric tube concentrically positioned about the principal axis of a cassegrain antenna and seated on the main reflector functions as a guiding structure for focusing the antenna radiation.

5 citations


Patent
20 May 1970
TL;DR: A built-in television antenna, particularly suitable for use as a UHF antenna, is made of a loop of convoluted metal tubing as discussed by the authors, which is used for UHF broadcasting.
Abstract: A built-in television antenna, particularly suitable for use as a UHF antenna, is made of a loop of convoluted metal tubing.

5 citations


Patent
06 Mar 1970
TL;DR: An array antenna capable of simultaneously radiating several microwave parns where the antenna elements are individually energized by p-n junction devices that are controlled by electron beams is described in this paper.
Abstract: An array antenna capable of simultaneously radiating several microwave parns wherein the antenna elements are individually energized by p-n junction devices that are controlled by electron beams.

4 citations


Journal ArticleDOI
TL;DR: In this article, the array-transmit impedance at the simuIated scan angle is computed for a phased-array antenna of Iossless elements simulated in waveguide, for a single-input single-out (SISO) channel.
Abstract: This program computes, for a phased-array antenna of Iossless elements simulated in waveguide, the array-transmit impedance at the simuIated scan angle.

2 citations


Journal ArticleDOI
TL;DR: A simple and inexpensive microstrip transmission line of adjustable length is described, electrically similar to the usual coaxial line stretcher and can be fabricated easily from standard printed circuit or microstrip boards.
Abstract: A simple and inexpensive microstrip transmission line of adjustable length is described. The device, although physically considerably smaller, is electrically similar to the usual coaxial line stretcher and can be fabricated easily from standard printed circuit or microstrip boards.

Journal ArticleDOI
TL;DR: The authors have applied the 3D FDTD technique to simulate the propagation of electrical signals on a microstrip antenna using a 4-transputer array connected to a 386-based PC to show improved accuracy and decreased run-time.
Abstract: The authors have applied the 3D FDTD technique to simulate the propagation of electrical signals on a microstrip antenna using a 4-transputer array connected to a 386-based PC. This relates to work currently being carried out into the propagation of very high speed digital pulses in printed circuit boards in high bandwidth systems. Methods have been devised by the authors which reduce the amount of stored data and improve run-time. These methods include sub-gridding, shielded volume and concurrent processing of the problem. Results have been obtained and are presented in this paper to show improved accuracy and decreased run-time. An analysis of run-time to the number of transputers in an array for optimum operation has been presented. A trade-off between inter-transputer communication of segment boundary conditions and the size of each segment has also been discussed in the paper.


Proceedings ArticleDOI
01 Jan 1970