![]() The easiest way to create this is with an s-parameter template as show below. This is just a human readable csv file that lists the phase/magnitude(or equivalent representation) of the S11 measurement at every frequency. Once measured you will need to export a ‘touchstone’ s1p file. As the DC voltage reaches a certain level, the device starts operating. This induced AC voltage is rectified to provide a voltage source for the device. PCB antenna design software accurately analyzes the filters, microstrip lines, and passive components that make up a PCB antenna. Figure 1 Basic principle The antenna acts as the inductor. This is because NFC readers operate at 13.56 MHz. DS00710C-page 1 AN710 INTRODUCTION Passive RFID tags utilize an induced antenna coil voltage for operation. The basic principle of antenna design is to create a circuit resonating at close to 13.56 MHz with an inductance (antenna) and an internal or external tuning capacitor. Try to think if you error is likely to be a significant fraction of a wavelength. Antenna Circuit Design for RFID Applications 2003 Microchip Technology Inc. As normal the accuracy you need for this is dependent upon the required frequency. ![]() If we design a matching network it will be assumed that this is where we place our components. We must be very careful to understand the calibration plane of tour antenna. However I will highlight one critical point. I won’t go into detail here about how to measure an antenna as this was covered in my previous posts. The Device Under Test could really be any device, but as I am an antenna geek, lets assume its an antenna. Once you get to grips with the basics here, you can always experiment in QUCSstudio with alternate components. RF software simulation techniques, and small antenna design. However it is possible to use alternative components such as transformers, transmission lines, or even resistors as part of an matching network. New chapters have been added that detail RF testing procedures, printed circuit board layout. Of course, I had totally forgotten!!! But lets go through it again.Ī matching network is normally a network of inductor or capacitors selected to convert from one impedance to another. I was asked in the comments about exactly to do this. Qucs has a calculator for coupled microstrips, so in. This could be used to quickly design antenna matching networks for instance. The design and simulation of the directional coupler was done in Qucs (Quite Universal Circuit Simulator). In my last blog post I alluded to the fact that you could take s1p touchstone files generated by nanoVNAsaver and use this to automatically calculate/simulate a matching network in QUCSstudio. qucs - NFC Antenna matching - Electrical Engineering Stack Exchange NFC Antenna matching Ask Question Asked 4 years, 11 months ago Modified 4 years, 11 months ago Viewed 114 times 0 I am trying to follow the TI document on NFC antenna matching for the TFR7970A chipset.
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