Showing papers on "Microstrip antenna published in 1969"
TL;DR: The shallow-cavity crossed-slot antenna is a UHF radiator designed primarily for use on a high-speed aircraft operating as the airborne terminal in a satellite-to-air communications link as discussed by the authors.
Abstract: The shallow-cavity crossed-slot antenna is a UHF radiator designed primarily for use on a high-speed aircraft operating as the airborne terminal in a satellite-to-air communications link. The requirements, design analysis, and performance characteristics are described. The antenna's shallow profile makes it attractive either as a paste-on- or flush-mounted-type radiator. Near-hemispherical radiation coverage is provided.
54 citations
40 citations
Patent•
01 Jul 1969TL;DR: In this paper, a corporate network printed antenna system is described, where the feed lines are located in coplanar relationship with and in the field of the antenna, and the antenna is constructed in a two-dimensional manner.
Abstract: A corporate-network printed antenna system is described wherein the feed lines are located in coplanar relationship with and in the field of the antenna.
34 citations
TL;DR: In this article, a finite cylindrical antenna which is imbedded in a concentric dielectric rod has been investigated by employing a rigorous formulation, and it is found that the input conductances are larger than for the corresponding free-space antennas, the field patterns tend to be more broadside and, as the antenna gets longer and longer, the locus of the input admittance becomes a circle instead of converging to one point as it does for a bare cylinrical antenna.
Abstract: A finite cylindrical antenna which is imbedded in a concentric dielectric rod has been investigated by employing a rigorous formulation. When the antenna is relatively short, a numerical method is used; when the antenna is long, the Wiener‐Hopf technique is applied. In both cases the input admittance and the current distribution are obtained. It is found that the input conductances are larger than for the corresponding free‐space antennas, the field patterns tend to be more broadside and, as the antenna gets longer and longer, the locus of the input admittance becomes a circle instead of converging to one point as it does for a bare cylindrical antenna. The first method is applicable regardless of the thickness of the antenna and the dielectric rod; the second method can be applied only to a sufficiently long antenna. The minimum length is determined by the thickness of the dielectric rod. This study is limited to thin antenna in rather thick dielectric cylinders. However, the dielectric rod is still not thick enough to support a transverse magnetic (T.M.) mode.
17 citations
Patent•
Avco1
TL;DR: In this paper, an energy radiator for use in small projectiles is described, which is achieved by propagating energy along two conductors, one of which is placed above the other as a parasitical element in which the voltage node is displaced approximately 0.
Abstract: An energy radiator for use in small projectiles is disclosed. Effective wave propagation is achieved from the radiator by propagating energy along two conductors, one of which is placed above the other as a parasitical element in which the voltage node is displaced approximately 0* with respect to the voltage node of the first conductor.
10 citations
Patent•
02 Dec 1969
TL;DR: In this article, the authors present an antenna radiation lobe scanning system for monopulse radar, in which the antenna is formed of an array of elementary antennµ, or radiating sources, each of which has a phase adjuster, 1.m.
Abstract: 1,171,938. Aerials. THOMSON CSF. 9 Dec., 1966 [13 Dec., 1965], No. 55353/66. Heading H4A. In an antenna radiation lobe scanning system for monopulse radar, the antenna is formed of an array of elementary antennµ, or radiating sources, Sm, each of which has a phase adjuster, 1.m, in the associated feeder. The signal representing the required beam axis angle is applied at 30 to the phase computer, 30, which derives the theoretical value of the phase shift for each phase adjuster. The outputs from 30 are applied to the computer, 4, which derives quantized phase shift values, which approximate to the theoretical values, in accordance with a predetermined rounding-off law. The quantization phase errors, derived at 4, are applied to the computer, 5, together with the required angle signal, from 30, the beam angle error is provided at the output 52 but applied to the adder 7. The output from 7 is the effective beam angle and is applied to the data processor, 8, also fed from the receiver, 2.
8 citations
Patent•
01 Apr 1969TL;DR: In this paper, the authors present a new form of MICROSTRIP MOUNT for two-tier SEMICONDUCTOR DEVICES, which is used in the construction of a MICROWAVE IMPATT OSCILLATOR HAVING AN EXTREMELY LOW Q and CONSEQUENTLY a very high LOCKING FIGURE OF MERIT.
Abstract: THE PRESENT INVENTION IS A NEW FORM OF MICROSTRIP MOUNT FOR TWO-TERMINAL SEMICONDUCTOR DEVICES. ITS ELEMENTS INCLUDE FIRST: A LARGE RADIAL CAPACITOR WHICH ACTS AS A DC CONNECTOR AND AN RF DECOUPLER BETWEEN A DC, BIAS SOURCE AND ONE SUCH DEVICE, AND ALSO ACTS AS A COMPOSITE GROUND PLANE FOR THE RF SIGNAL GENERATED IN THE DEVICE, AND SECOND, AN ADJUSTABLE CONDUCTIVE BRIDGE WHICH PROVIDES A DC PATH TO ONE OF THE DEVICE TERMINALS FROM ONE SIDE OF THE RADIAL CAPACITOR AND THROUGH THE CAPACITOR FORMS A CAVITY WHICH RESONATES AT THE DESIRED FREQUENCY WITH THE REACTANCE OF THE DEVICE. IN ONE ILLUSTRATIVE APPLICATION, THE INVENTION IS USED IN THE CONSTRUCTION OF A MICROWAVE IMPATT OSCILLATOR HAVING AN EXTREMELY LOW Q AND CONSEQUENTLY A VERY HIGH LOCKING FIGURE OF MERIT.
5 citations
01 Oct 1969
4 citations
3 citations
TL;DR: It is shown that a long cylindrical antenna with multiple excitations can be made to have desirable current distributions along its structure when the driving voltages and the positions of the generators are properly chosen.
Abstract: It is shown that a long cylindrical antenna with multiple excitations can be made to have desirable current distributions along its structure when the driving voltages and the positions of the generators are properly chosen. Applications of this technique to practical problems are discussed.
TL;DR: In this article, the propagation coefficient of a microstrip line, into which a two-valley semiconducator is insterted instead of the dielectric layer of the conventional microstrip lines, is analyzed.
Abstract: The propagation coefficient of a microstrip line, into which a two-valley semiconducator is insterted instead of the dielectric layer of the conventional microstrip line, is analyzed. The analytical results show the feasibility of making an electronically tunable Gunn-didode oscillator.