Antenna with Distributed Positive Resistance

[micael]

transformer

Hi,
I have tried the transformer 1:36(http://www.coilcraft.com/pdfs/wb.pdf) yet i can't reach 2.5V (which is the minimum voltage required to trigger a PIC)... i assume that the output voltage from the antenna itself is less than 1V.
What i m trying to do now is to use a 2 Pin 'Bead' AM Transmitter Module (AM-TX1-433 http://www.rfsolutions.co.uk/acatalog/DS012_1.pdf) and a 1/4 Wave Whip Antenna (http://www.rfsolutions.co.uk/acatalog/Flexi_Whip_Antenna.html) ONLY as a receiver, to check the output voltage from the receiver antenna at 3m from the transmitter.
(This is all about an MSc project)

 

[John_M]

Voltage multiplier circuit.

 

[N_Jay]

Hi,
I have tried the transformer 1:36(http://www.coilcraft.com/pdfs/wb.pdf) yet i can't reach 2.5V (which is the minimum voltage required to trigger a PIC)... i assume that the output voltage from the antenna itself is less than 1V.
What i m trying to do now is to use a 2 Pin 'Bead' AM Transmitter Module (AM-TX1-433 http://www.rfsolutions.co.uk/acatalog/DS012_1.pdf) and a 1/4 Wave Whip Antenna (http://www.rfsolutions.co.uk/acatalog/Flexi_Whip_Antenna.html) ONLY as a receiver, to check the output voltage from the receiver antenna at 3m from the transmitter.
(This is all about an MSc project)

MSc, Masters in Science?

What field?

You have completely ignored (or did not grasp) the idea of biasing up the detector so it would not need to achieve the full 5 volts.

Based on the questions that you have been asking, I am going to assume you do not understand (or have no knowledge) of how a tuned circuit works or how to design one.

You need this information to be successful at what you are attempting.

You should STOP your design by trail and error and take a SCIENTIFIC approach to your goal.

 

[N_Jay]

Voltage multiplier circuit.

He does not have the current for that.
(although he probably does not realize this as I doubt he grasps the fact that the antenna as a source is power limited.)

 

[OpSec]

Cowthief ???

It's beginning to look like it...no FPP Spectra reference yet, tho.

 

[micael]

I would have the antenna excite a parallel tuned circuit coupled tapped to provide the output. I would detect that output and add it to some higher then ground reference to make tripping the line easier.

If I go much further I am going to need to charge you

This circuit consumes battery energy is like a comparator....

WIRELESS BATTERY CHARGING SYSTEM USING RADIO FREQUENCY ENERGY HARVESTING-->
http://etd.library.pitt.edu/ETD/available/etd-07212004-192328/unrestricted/Harrist_Thesis_072804.pdf
(MSc in Communication Engineering)

 

[N_Jay]

This circuit consumes battery energy is like a comparator....

WIRELESS BATTERY CHARGING SYSTEM USING RADIO FREQUENCY ENERGY HARVESTING-->
http://etd.library.pitt.edu/ETD/available/etd-07212004-192328/unrestricted/Harrist_Thesis_072804.pdf
(MSc in Communication Engineering)

Holly ****!!!,
Some one did a master thesis proving you can rectify RF?

Didn't this guy know that contact-less charging has been around for about forever.

Geeze, if that gets you a Masters, no wonder I run into so many high degreed stupid people.

As for your project, you are lost.
You are very obviously trying to work at a level well beyond your understanding.

Go get help from someone LOCAL who can work through the issues.
Sorry for being blunt, but it is like trying to give diving directions to someone and later finding out they don't know their left from their right!

 

[micael]

antenna simulation

Hi,
For 1/4 wave monopole antenna to receive a 433Mhz signal a 17.5cm straight piece of 1.5mm wire is used.
Can someone please tell me how to simulate this type of antenna as an AC supply?...
1) How to set the amplitude of an AC supply to much that of the antenna?
2)Is it ok if i use 60Hz as the AC supply frequency?

 

[N_Jay]

Hi,
For 1/4 wave monopole antenna to receive a 433Mhz signal a 17.5cm straight piece of 1.5mm wire is used.
Can someone please tell me how to simulate this type of antenna as an AC supply?...
1) How to set the amplitude of an AC supply to much that of the antenna?
2)Is it ok if i use 60Hz as the AC supply frequency?

I think you are chasing your tail.

Get a signal generator.

 

[Al42]

Hi,
For 1/4 wave monopole antenna to receive a 433Mhz signal a 17.5cm straight piece of 1.5mm wire is used.
Can someone please tell me how to simulate this type of antenna as an AC supply?.

Just use a 433 MHz signal. The one your transmitter uses will work. Be sure to current-limit it to a few dozen microvolts, since that's about what the antenna is going to produce.

1) How to set the amplitude of an AC supply to much that of the antenna?

Depends on the nature of the supply. If it's a transmitter, vary the power to the output stage.

2)Is it ok if i use 60Hz as the AC supply frequency?

Not if you're simulating a 433 MHz supply. 60 Hz isn't 433 MHz. "Simulate" doesn't mean "get the effect I want, regardless of what I have to fake to get it".

Someone tried that with cold fusion, remember?

Holly ****!!!,
Some one did a master thesis proving you can rectify RF?

Didn't this guy know that contact-less charging has been around for about forever.

I don't know about forever (I was born a few days after forever started), but we were drawing power from broadcast signals in the late 40s. And people were rectifying RF before DeForest invented the Audion.

 

[Napalm]

Wow. Just goes to show, having a degree doesn't mean you know what you're talking about

yay for having no qualafamakashuns

 

[ki5sr]

Note to ki5sr:

Well said sir!

And only your second post?

Anyway - a great discussion!

Thank you! And sorry to be so long in replying to your kind note. I was called away for a moment.

Ross

 

[prcguy]

Wow, it took over 10yrs to respond? That takes the term "wait for it!" to a new level. Better late than never.
prcguy

Thank you! And sorry to be so long in replying to your kind note. I was called away for a moment.

Ross