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    • Rahul Ponginan

      Please click here for a short but important announcement   03/26/17

      Dear Users Our Commercial and Academic users around the world can use these same forums here as before i.e. the Altair Support Forum , Commercial users from India with solver queries can go to the Solver Forum for India Commercial Users , Academic Users from India and AOC India Participants are requested to go to the Forum for India Academic Users and AOC India Participants , We will be tending to all queries in all the forums promptly as before, thank you for your understanding. 

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  1. Hi Good day, I would like to start with creating two different magnetic based coils as Transmitting coil (TC) and Receiving coil (RC), to measure the Z impedance values changes with respect to the movement of TC around RC. Following are the configuration which I would like to proceed, Transmitting Coil: L 67 uH Q 22 Ccalc 24.19 nf - - F 125khz Receiving Coil: Coil Configuration L 728.73 uH Q 53.24 R 15kohm Ccalc 2.224nf F 125khz - - The Receiving Coil (RC) resonated at a frequency of 125kHz and diameter of 7cm. Transmitting coil (TC) dimension is 9 x 9 x 9 mm^3. Datasheet of RC as: https://www.rfsolutions.co.uk/downloads/1457021091DS-ANT-125K.pdf Initially, the RC and TC will be 3cm away from each other on z axis. The Impedance( |Z| ) value can be measured with respect to the movement of TC on x-axis/y-axis. -> The RC: loop antenna actual dimension, the copper wire diameter, number of turn, the diameter. (the details of the coil determine the inductance value) For RC: 0.236mm diameter (34 swg) Enamelled Cu wire. Diameter Antenna: 7cm internal , Number of turns: 67 turns Inductance: 700uH Quality Factor (Q): 17 For TC: Inductance: 67 uH Quality Factor (Q): 22 Capacitor: 24.19 nf Frequency (F) 125 kHz Number of turns: 52 Diameter: 8mm -> Matching circuit details. Matching circuit For RC : C = 2.3159nF (Formula:F=1/2π √LC) Matching circuit For TC : C= 24.19nF (Formula:F=1/2π √LC) kindly can you suggest me the step or user manual for me to start on to this project. Looking forward to hearing your comments on it, Regards
  2. Hallo, I'm trying to design a dual reflector antenna and I'm using as a test a plane wave as a feed system with CADFEKO. But when I try to create mesh the software blocked and in 7% and I should close the whole software. I have a student version of Feko and I'm a new user of it. So maybe there is something missing in my design. In GRASP a plane wave can be used as a feed system and its size and coordinates can be set as well but in Feko I didn't find such a thing yet. I would appreciate your help so much. Thank you for your attention