Questions tagged [tuning]

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Tuning PID Controller with high precision

I'm learning control theory at university and I have to design PID controller for this object G(s) = 10/s(s+1); But my teacher requires settling time <10s and %overshoot <=2% Anyone can suggest ...
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30 views

Si4362 Reciever operating outside band

Fellow engineers, I have RF related problem I've found interesting receiver chip which I intend to use outside designated band. Si4362 It is stated in datasheet that: Frequency range = 142–1050 ...
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2answers
33 views

Antenna Tuning for a Multi-band Antenna

I have PCB antenna . which support multiple band antenna. https://www.johansontechnology.com/datasheets/0830AT54A2200/0830AT54A2200.pdf we also have tune circuit before antenna as recommended by ...
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21 views

Particle Swarm Optimization for PI Tuning?

How can I use Particle Swarm Optimization to tune more than one PI controllers at a time and how can I design the objective function base on this?
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3answers
101 views

RF Jumper at 2440MHZ

I need a series component to isolate a 2440MHZ antenna for testing purposes-- it can either be a a high quality 0402 RF capacitor (Johansen) or a zero ohm resistor. The series component will remain ...
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3answers
98 views

Radio tuning capacitor

In a radio tuning capacitor that consists of semicircular plates , are the plates connected in series or in parallel ?
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1answer
148 views

Antenna tuning & impedance matching, do i need to connect the IC?

I want to make a pcb rf trace to use it as an antenna, for a bluetooth IC. I have already studied the basics of impedance matching and antenna tuning, smith chart and antenna clearance. The specific ...
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0answers
107 views

Can I replace the transistor in this circuit (Esaki oscillator) with a Zener diode?

Can I replace the transistor in this circuit (Esaki oscillator) with a Zener diode?
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1answer
56 views

Do algorithms exist for tuning microwave filters?

I'm a systems engineering student and I have taken a summer job at a company that manufactures various microwave filters, my role is to "try" improve and standardise their processes in order to ...
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2answers
84 views

My antenna tuning component values worked on a fresh board previously. Now they're not working. What could be causing this?

This is one of those hardware questions that's making me bang my head against a wall. About six weeks ago I spent a day tuning the NFC antenna on my board. I ended up using ~71pF of shunt capacitance ...
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0answers
25 views

Finding the gain difference for a ultrasonic assembly

I am tuning an ultrasonic assembly for a welding application and tuned the system to operate at 41kHz according to the oscilloscope. The transducer operates at 40kHz, when calculating the gain with ...
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0answers
74 views

How does this double-tuned antenna work?

I am trying to understand how the attached circuit works, for tuning a transmission/receiver antenna (L1) for double frequency (HF, 500 MHz on the left output and 202 MHz LF right), to be used in ...
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1answer
176 views

Where to connect the VNA during matching network tuning

I'm trying to design the matching network between an antenna and its transmitter, running at 868MHz, as shown below. There's probably about 20mm between the transmitter output and the Pi network. ...
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0answers
38 views

MOSFET Switch for Tuned LC Tank

I am trying to implement the circuit as shown below. I essentially want to be able to control the gate voltage of the NMOS to change the resonant frequency from 5GHz to 2.5GHz. For a transistor size ...
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0answers
183 views

Magic Eye Tuning Tube Variable Negative Voltage

I am thinking about several applications of magic eye tuning tubes as display pieces and had a question about their operation. I have attached a sample circuit from a datasheet for an EM84 tube. I ...
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1answer
89 views

Some questions regarding impedance matching and tuning

For maximum power transfer in a circuit impedance matching is performed: Similarly from the transmitter antenna to the receiver/load one can think the total impedance from antenna to the receiver as ...