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Questions related from Meenakshi Kohli
I need to design a phased array with freq. 2000 MHz to 2300 MHz specification. Thinking of linear array. Directivity should be high like 20 dBi and circular polarization. Can you please advise me...
02 February 2020 4,354 4 View
I am having difficulties in designing stripline on cst. The reference impedance should be 50 ohms and it should be straight line at 50 ohms. Please guide what mistake I am making. I played with...
08 August 2019 2,729 7 View
I am designing metamaterial enabled antenna for wideband freq. I have antenna with wideband freq. bandwidth. Have a metamaterial at the back of antenna, but not able to get wideband when I put the...
08 August 2019 6,012 10 View
Is metamaterial same as metamaterial transmission line? Why do we need transmission line on metamaterial? Is this an antenna once we put transmission or stripline on metamaterial. Any guidance is...
06 June 2019 7,187 5 View
any paper links
06 June 2019 6,701 5 View
I am in need of high k polymer material but it has to be flexible as my application is wearable.
12 December 2018 1,449 5 View
Gain of 2 arm archimedean spiral antenna
02 February 2018 4,301 2 View
What is the impedance of Bow-Tie antenna? How we can match the impedance with coaxial feed? Please Suggest
07 July 2017 6,019 2 View
Can someone guide me how can I know what bandwidth metamaterial surface can support and How can I calculate that for my specific frequency band?
03 March 2017 5,617 3 View
How does it affect the impedance and radiation pattern of Archimedean Spiral antenna if the width of the turns are wider, if no. of turns gets increased or the spacing between the turns increased...
01 January 2017 1,736 6 View
I am working on Metamaterials and getting more information about it. Regarding that, I want to know what does it mean exactly that tangential component of E (Electric) is Zero. Please Help
01 January 2017 8,889 6 View
IF I want to match the impedance of Archimedean spiral antenna with the components like R, L, C. The impedance of antenna is 180 ohms with plus minus 20 ohms reactance. Please suggest and help
11 November 2016 4,339 4 View
In an Archimidean Spiral antenna, if we change the width of arm or change the spacing between the arms, What will happen? Can anyone please help me with these concepts? Its an 2 arm Archimedean...
11 November 2016 8,609 1 View
I am designing a Spiral antenna and to match Impedance with coaxial. I am taking the concept of quarter wavelength Transformer. But Not able to get good results in simulation itself. Can somebody...
10 October 2016 8,229 8 View
I am trying to design a Spiral antenna in CST. When I use macros and then coils and then spiral antenna. This geometry has only one arm. How can I construct a 2 arm spiral antenna?
09 September 2016 4,955 14 View
I am designing a spiral antenna with a rectangular cross section. But at the center it is joining the two turns. Therefore, I am having difficulties with the port. Everytime It gives me an error...
09 September 2016 1,084 3 View
Can i change the twin lead impedance? Can I simulate this on HFSS?
08 August 2016 5,901 3 View
How can I design a Twin Lead Transformer of impedance 180 ohms? I need this impedance transformer between coaxial cable and my Spiral antenna. Please guide me.
08 August 2016 1,243 3 View
If we make the spiral feed from edge, how to feed it at 180 deg phase shift
08 August 2016 7,422 4 View
Hello, I am designing a spiral antenna with an Edge feed. This antenna has 5 turns. I got comparatively stable impedance between 2 - 6 GHz. But see little reactance. I am not able to make that...
02 February 2016 6,056 3 View
What is the input impedance of a Bow-Tie Antenna?
12 December 2015 3,590 9 View
I am trying add one more arm in 2 arm archimedian spiral, so it will be 3 arm spiral. Can somebody please help me in the matlab code? I am not able to add the 3rd arm..
06 June 2015 8,536 0 View
So, I got good bandwidth using a substrate with dielectric constant 3, but my substrate is thick. To go with thin substrate I thought of using material with high dielectric constant. So, I ran...
01 January 1970 2,621 9 View
Is it necessary to have gap between the metamaterial and the antenna? If yes, there should be air or air like material in between or some high epsilon material should be there in between? Please...
01 January 1970 8,600 7 View
