Manjurul Ahsan Riheen

13 Questions 18 Answers 0 Followers

Questions related from Manjurul Ahsan Riheen

HFSS Simulation Dipole length on Fr4 Substrate 42mm (greater than lambda/2 at 2.4 GHz which is 30mm for Fr4). Can someone explain why??

Hi, I have designed a simple center fed dipole on Fr4 substrate at 2.4 GHz. Resonance at 2.45 GHz. But to achieve that I need to increase the dipole length to 42mm. In Fr4 substrate, the...

21 April 2025 2,478 2 View

Can someone help me understand the dipole length from the attached paper?

Hi, I know that dipole length should be lambda/2. But in the attached paper the author designed a planar printed dipole array at 2.4 GHz on FR4 substrate where single element arm length 2L = 50...

20 April 2025 6,713 2 View

If a phased array is designed for 1 gHz, what will be the radiation pattern if the beam comes at 1.1GHz?

Hi, Someone asked me a question " If a phased array is designed for 1 gHz, what will be the radiation pattern if the beam comes at 1.1GHz? I know at 1.1 GHZ the wavelength is different so the...

25 March 2025 5,330 3 View

Microwave substrate DF value is not given but FxQ value is given in spec sheet. What DF value should I use as substrate DF in HFSS?

Hi, I want to use attached material in my HFSS simulation. In the spec sheet the DK was provided but instead of DF they provided FxQ. What value should I put in HFSS for loss tangent or DF? Can...

18 January 2024 1,791 1 View

Why low dielectric loss tangent (TanD) substrate causes narrower bandwidth in antenna?

Can someone please explain why low dielectric loss tangent (TanD) substrate cause narrower bandwidth for antenna and vice versa?

14 September 2023 1,397 1 View

How to find the matching network loss of an antenna?

Hi, I simulated an antenna with a matching network. Now to calculate the antenna range using Friis equation I need to know the losses due to the matching network. Can anybody suggest how can I...

19 May 2023 1,487 11 View

For UWB antenna, what is acceptable value of group delay variation?

Hi, I am designing UWB antenna. I know group delay variation is an important parameter. Is there any limit for GD variation. If yes, what is the acceptable group delay variation value for UWB...

30 November 2022 5,804 4 View

NFC Antenna simulation and actual measurement does not match well. Anybody can help?

Hi, I am simulating a NFC antenna (planar coil inductor) on a polyimide substrate in HFSS and comparing the input impedance/smith chart of the simulation with the fabricated sample. I checked the...

29 December 2021 9,701 12 View

How to check NFC Antenna inductance in HFSS?

Hello, I have simulated a NFC antenna in HFSS. But I dont know how Ito check the inductance value of the NFC antenna in HFSS. Can anybody help in this regard?

04 December 2021 2,152 2 View

Any help for feed network design of a CPW fed slot antenna array?

Hello, I am trying to design a feed network for CPW fed slotted antenna array in X band in HFSS. Can anybody help to share a step by step guideline how I can form the feed network?

28 December 2019 3,522 3 View

HFSS radiation pattern issue: Not getting proper omnidirectional shape. Why?

Hello, I am trying to design a broadband antenna. I am getting proper S11 response (-10dB) for about 4.5 GHz to 10.5 GHz. But the problem is I am not getting desired omnidirectional shape in...

15 May 2019 10,205 3 View

In HFSS, What should be the solution type (single/multi/broadband) and sweep (Fast/discrete/interpolating) for UWB antenna (3.1-10.6 GHz) antenna?

Hi, I am trying to design an UWB antenna. But, I am confused about selecting solution type and solution frequency. My structure has multiple resonant frequency. I am getting different S11...

15 May 2019 8,444 10 View

How to select Dielectric constant and loss tangent value in HFSS for PET film?

Hi, I am trying to simulate an antenna on PET substrate having dielectric constant 3.2 and loss tangent 0.022 at 10 GHz. But, I want to simulate the antenna at frequency >20 GHz. Would you...

12 October 2018 4,091 3 View