We are developing integrated and receivers antennas for terahertz applications. As the remote-sensing/radio-astronomical frequencies are pushed higher into the millimeter and submillimeterwave regions, integrated antennas and receivers become competitive with standard waveguide receivers. The integrated receivers consist of an antenna integrated directly with a matching network/mixer. Integrate...

A cooperative program between the Jet Propulsion Laboratory and the National Bureau of Standards will result in the gain measurement of a horn antenna using three different techniques: a two-antenna insertion loss measurement, a pattern integration method, and a near-field measurement method. This article describes the application of the pattern integration method and also the evaluation of the...

A W-band dual-polarized Cassegrain antenna for cloud radar is proposed. The aperture diameter of the main reflector of the antenna is 50 cm. By using a modified Magic-T structure in the feed horn, the antenna is dual-polarized with high port isolation. The measured results show that the port isolation is 44.7 dB. The gains are 47.3 dB and 49.5 dB for the two ports at 94GHz, respectively, and th...

The paper presents the design and fabrication of a H-plane substrate integrated waveguide (SIW) horn antenna. The antenna operates at 60 GHz band and is equipped with a SIW-to-WR15 transition. Experimental results prove that the antenna achieves the gain of 11.5 dBi and the impedance bandwidth of 14 % for the reflection coefficient less than -10 dB. The antenna was designed with the help of CST...

Antennas for radiating high-power mesoband electromagnetic signals are critical to the mission of upsetting electronics at a distance. High Power Microwave (HPM) weapons require efficient antennas that can fit into a small volume. Many of the existing antennas, such as pyramidal horns, are too large to fit onto many platforms when operated at low frequency. To address this problem, we investiga...

We develop a simple model for a feed horn with a uniformly excited circular aperture at the focus of an offset paraboloidal reflector antenna and compare it with reflector antenna analyses using combinations of circular waveguide TE1n modes. The model demonstrates the deep dip that can occur at the spot-beam center for certain feed diameters and it is used in a design procedure that relates the...

Abstract: In this work a heuristic optimization algorithm known as the Fruit fly Optimization Algorithm is applied to antenna design problems. The original formulation of the algorithm is presented and it is adapted to array factor and horn antenna optimization problems. Specifically, it is applied to the array factor synthesis of uniformly-fed, non-equispaced arrays and to the profile optimiza...

M. S. A. S. Rizk and G. Moms, “New class of broadband hybrid mode horn,” presented at Inst. Elec. Eng. Colloquium on Antenna Bandwidth Extension Techniques, London, Oct. 28, 1985. H. C. Minnett and B. MacA. Thomas, “A method of synthesizing radiation patterns with axial symmetry,” IEEE Trans. Antennas Propagat., vol. AP-14, pp. 654-636, Sept. 1966. N. Marcuvitz, Waveguide Handbook. New York...

Linear-array of circular split ring resonators (C-SRR) integrated wideband notched filtering horn antenna with very strong rejection-band is proposed in this article. The linear C-SRR array, consisting 3-sub arrays each having 4 identical C-SRR-elements, printed on a dielectric substrate and into the throat or waveguide-section standard X-band (Narada 641). Staggered arrangement multiple C-SRRs...

Cassegrain Reflector Antenna Design consists of various effects caused by blockage and its effect on overall performance. The design for minimum blockage condition results in geometry that offers lower amount of blockage and increased spillover past the subreflector. To avoid this, optimized design of the antenna results in geometry that offers lower amount of spillover past the edges of the ma...