Monopulse Feed System Research Articles

Design and analysis of a multimode feed horn for a monopulse feed

The design of a multimode feed horn for use in a monopulse feed system is summarized. Both amplitude and phase patterns have been obtained and compared with measurements. The far-field amplitude and phase patterns are computed in consideration of achieving the desired aperture distributions for the sum and difference beams. The phase center of the horn is discussed in relation to the multimode excitation and frequency dispersion. It is shown that the phase center location moves as the mode content changes, and proper adjustment of the mode content will result in design optimization. Some tradeoff curves are also presented for design optimization.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Design and Study of the Elevation Difference Channel Feed of the Single Aperture Monopulse Feed System

The technique to generate the higher order modes TE11 and TM11 in the square waveguide, required for the E plane error single channel feed in the single perture monopulse feed system, has been presented and the appropriate assembly for this purpose has been designed in the 8.5-9.0 GHz frequency band. The assembly can be incorporated as an E plane error signal channel feed in the design of a single aperture monopulse feed system. The features of the design are a suppressed cross-polarised component of the radiation field and a deep null in the E plane pattern at the boresight axis of the feed. A qualitative explanation for the behaviour of the feed has been presented.

Dual-function multi-way uniform combline directional couplers for application to monopulse feed system

Dual-function multi-way uniform combline directional couplers for application to monopulse feed system

Monopulse Feed System

This paper describes a flexible monopulse feed system used in Radar and Communication Earth Station Antenna System. The aspects considered in the present communication are to optimize the performance and size, so that it may lead to make the system compact. Design and development of some of the components of the system along with the test results are presented here.

Cross coupling in a five horn monopulse tracking system

A model is developed which explains the observed effects of secondary pattern crosstalk in a five horn circularly polarized monopulse tracking system. The model predicts unstable operation and loss of track for sufficiently depolarizing targets as well as polarization dependent uncertainties in the angular location of off-axis targets. The cross coupling is characterized by two complex coupling coefficients between adjacent horns in the monopulse feed system. This characterization is assumed to be valid irrespective of whether the observed secondary pattern effects are the result of mutual couplings within the feed structure itself or caused by cross-polarized backscatter from the paraboloidal reflector. A and nonridge polarization terminology is adopted which is physically related to the fact that the error horns in a five horn circularly polarized system are heavily ridge loaded for one linear polarization and not the other.

A new circularly polarized monopulse feed system

A new circularly polarized monopulse feed system