RF Designs and Simulations

https://anilkrpandey.wordpress.com/2019/12/26/top-10-technologies-trend-for-2020/ Innovation is advancing quicker than ever. As technology advances, it enables even faster change and progress, causing an acceleration of the rate of change, until eventually, it will become exponential.  Engineers and researchers that don’t stay aware of some of the significant-tech patterns take the risk of being abandoned. Understanding the key patterns will enable individuals and researchers to plan and embrace opportunities. There are many such technologies that have already made their prominent mark in 2019 and are only a few more applications away from becoming mainstream like 5G. Artificial Intelligence is one of the fast-growing technology for the future. The technology, with its potential to mimic the human brain, has offered numerous opportunities to different areas. Distributed ledger technology such as artificial intelligence (AI), blockchain, virtual and augmented reality, and Qu...

Practical Microstrip and Printed Antenna Design Book Cover My new book: “ Practical Microstrip and Printed Antenna Design ”, is all set to be released by end of this month (March 2019). The book covers the topic of microstrip antennas from roughly three vantage points: printed antenna fundamentals, antenna design technique, and design of real-world application-based antennas. This comprehensive resource presents antenna fundamentals balanced with the practical design of printed antennas. Microstrip and printed antennas are used in radars, aerospace systems, internet of things (IoT), satellite systems, 5G networks, MIMO, automobiles, and mobile phones. Supported with essential equations and illustrations, this practical book helps evaluate various design aspect of the antenna. Based on several years of my research in antenna design and development for RF and microwave applications, this book offers in-depth coverage of microstrip and printed antenna design methodology for modern a...

Over the past few year, machine learning has attracted the attention of antenna engineers. Generally, the process of antenna design requires to find out the EM characteristics of antenna by observing the current distributions through simulations. These EM properties are then used for the parameters optimization. Machine learning (ML) can be combined with simulations to design an antenna. The inclusion of artificial intelligence (AI) can give promising results in the field of antenna designing. In recent years, antenna synthesis or design optimization through evolutionary algorithms (EAs) has been applied widely. At present, differential evolution (DE) and particle swarm optimization (PSO) are top two popular algorithms in the antenna synthesis area. In smart antenna array, the objective of the gracefully degradation of the beamforming and beamsteering performance, can be achieved by reconfiguring the array when an element is found to be defective. This reconfiguration can be obtain...

A pillbox antenna is a linearly polarized cylindrical reflector embedded between two Parallel plates. It is usually fed by a waveguide. The pillbox is part of a family of antennas called fan beam antennas which produce a wide beam in one plane and a narrow beam in the other. The pillbox antenna can be dual polarized and is also a relatively wide bandwidth antenna. The advantages of using a pillbox antenna for radar applications are It is easy to design and the cost of production is low. It is dually-polarized and it is also a wide band antenna. It has a high power handling capability The pillbox feed is traditionally located at the focal point of the reflector. For symmetrical antennas this is located in the middle of the aperture. Either a pin or waveguide feed can be used, depending on the system requirements. Further variations of these feeds can be found through the use of stubs which are used to obtain better impedance matching and reflector illumination, not discussed ...

The desirable features of antenna for Airborne SAR applications include shaped radiation pattern and wide bandwidth capability, good cross polarization isolation and high power capability. Shaped radiation across the track improves the target dynamic range and compensates the requirement of STC (Sensitivity Time Control) correction at receiver end. Wide bandwidth performance results in finer resolution. Planar array antenna is preferred as compared to reflector type antenna for less air drag. More Detail: Microstrip and Printed Antenna Design

The answer to this question depends to a great extent on the particular antenna problem that is to be analyzed. There are various antenna simulation tools based on different numerical techniques. Software for antenna design can be selected based on antenna type and size. Choosing the right technique for solving an antenna problem is important, as choosing the wrong one can either result in incorrect results, or results which take excessively long to compute. Several key EM simulation technologies have emerged over recent years. Out of these, simulation technique the Method of Moments (MoM), Finite Element (FEM) and Finite Difference Time Domain (FDTD) solutions are used almost in all commercial software like Momentum, HFSS, CST, Sonnet, EMPro etc. Although in principal these technologies could be used to solve the same problems there are often good practical reasons why one particular simulator is better suited to solving a particular problem type. There are many considerations...

Slotted Waveguide Array Antenna Slotted antenna arrays used with waveguides are a popular antenna in navigation, radar, and other high-frequency systems. A waveguide is a very low loss transmission line. It allows propagating signals to a number of smaller antennas (slots). Each of these slots allows a little of the energy to radiate. Slot impedance and resonant behavior for a single slot are dependent on slot placement and size. Its exceptional directivity in the elevation plane gives it quite high power gain. The slotted waveguide has achieved most of its success when used in an omnidirectional role To make the unidirectional antenna radiate over the entire 360 degrees of azimuth, the second set of slots are cut on the back face of the waveguide. An 8×8 planar four pole X-band Tchebyshev dual inductive post substrate integrated waveguide filter from 10.15 GHz to 10.7 GHz is designed for terrestrial broadcasting. The filter is designed on the 5870 with a relative dielectric...

SIW technology is essentially a hybrid of microstrip and dielectric-filled waveguide (DFW) technologies. Starting with a PCB substrate, top and bottom metal layers provide two of the waveguide walls. Then, two parallel rows of vias are added, forming the side walls of the waveguide. Figure 1 shows a microwave filter constructed using SIW technology. The SIW technology for passive circuit design has been  implemented for its low cost, compact topology and high performance. There has been increasing interest in implementing SIW technology in active circuits and complete systems, including active integrated antennas.