Antennas and Propagation

antennas, including analysis, design, development, measurement, and testing; radiation, radio propagation, and the interaction of electromagnetic... | Contact experts in Antennas and Propagation to get answers

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Questions related to Antennas and Propagation

Establishing an underwater radio communication link.

Is it possible to establish high quality data and voice communication in underwater?

04 April 2013 841 18 View

Z Parameters of an antenna

For any antenna I can plot the Z Parameter using different software. It consists of real and imaginary parts. I don't know how to interpret the plot. What is the importance of Z parameters in case...

04 April 2013 4,624 11 View

Ambiguity in the use of fading terms in wireless communication.

Fading is a major impairment to wireless communication. The problem is that the term fading has many classifications and the terminology seems sometimes to be ambiguous. In many cases you need to...

19 March 2013 4,808 8 View

What is a pseudo co-variance matrix? In DOA estimation, how can we build a pseudo co-variance matrix from 5 snap shots only?

03 March 2013 1,717 1 View

Microwave link design basic question

Just reading up on microwave link planning for university. When people speak of STM-1, E1, T1 etc., what are they referring to? Is it the data rate from the radio unit to the antenna? Or from...

03 March 2013 6,708 2 View

Does the battery utility have any difference from a fixed point communication to hand off communication?

Assume that while travelling in bus or train we are standing at point having a communication and having a conversation on our mobiles. Is there any difference in battery usage from these two modes?

03 March 2013 1,549 9 View

A paradox about antenna arrays: a question that has confused me for 10 years.

It is well known, for antenna arrays with omnidirectional point elements are isolated from each other, the antenna gain increases with the element distance is enlarged, as the beamwidth become...

03 March 2013 2,195 26 View

What type of noise will be added to RF waves after transmission? Due to the antenna height

RF waves and antenna height.

03 March 2013 5,285 5 View

A right handed circular wave incident on perfect conductor, after reflection from the surface what is the shape of the reflected wave?

The wave which is transferring through a medium , if it hit a surface wat will be the reflected wave

03 March 2013 8,826 3 View

Why is low frequency RF transmission not possible?

At a low voltage, I need to transmit the RF signal over a distance of 1 - 3m with the combination of low frequency below 100Hz.

03 March 2013 8,074 8 View

How to measure an antenna radiation pattern?

I have an antenna for a sonar project (I have a transmitting antenna and a receiving antenna) and I don't know the radiation pattern of either. How would I be able to measure them?

02 February 2013 6,804 14 View

How to find direction of max radiation i.e. (θ max,φ max)?

Given e_0 =sin(θ), how can I find the direction of max radiation i.e. the angles theta and phi max?

02 February 2013 3,410 1 View

Does this publication assume the phase of each element? (phased array)

I want to solve the mutual coupling problem for phased array antenna and need to consider the phase of each element (this problem is different from the incidental elements phases).

02 February 2013 6,742 1 View

How to assign port condition for CPW fed in HFSS?

Has anyone have a sample model and solved port condition

01 January 2013 9,967 1 View

How to design cpw fed port in HFSS?

How to include port condition in HFSS for cpw fed?

01 January 2013 1,271 9 View

In cst how to implement external and internal biasing for ferrites in microwave application?

Application of ferrite in microwave devices requires internal or external biasing, how to implement it using cst microwave studio?

01 January 2013 1,371 1 View

How we can measure radiation pattern of an antenna using VNA?

Vector Network Analyzer

12 December 2012 1,365 6 View

Does anyone do a research about geomagnetic field variation influence on microwave radio propagation?

Recently, I've measured some variations in receiving signal strength of a LOS radio communication link at 5 GHz which were moderately correlated with geomagnetic field strength variations at the...

12 December 2012 7,057 0 View

Need some materials on Green's function analysis.

I am working in the field of CEM. I am learning MoM technique in CEM. Green's function is an integral part of this. Please suggest some good reading materials for this topic. You can mail the pdfs...

11 November 2012 6,261 8 View

How can we use the Metamaterial antenna or metamaterial properties for the effective utilization of bandwidth?

What are the key factors that need to be considered while designing metamaterial antenna..?

11 November 2012 1,404 16 View

Can anyone please tell me the specific applications of different wavelength transmission lines like 5/11λ, 5/32λ, λ/10, 3λ/4 etc?

Overview of transmission lines

10 October 2012 2,221 0 View

Need help for formula to use in parameter extraction for metamaterial structure

I have simulated an structure on IE3D from which i got S11 and s21 .................. then i want to use MATLAB to calculate effective values of permeability and permittivity in order to check...

10 October 2012 589 15 View

Which CEM algorithm (comparing FDM, FDTD, FEM ,MoM) is better for antenna design, high speed interconnects etc?

There are many algorithms for numerical design. I know that each algorithm has its own advantages and disadvantages. But I would like to know which of these is better for antenna design and...

10 October 2012 4,331 13 View

What is the best antenna design for digital television?

Antenna and propagation

09 September 2012 2,949 2 View

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