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Amplitude modulation

Amplitude modulation

Amplitude modulation


I would like to amplitude-modulate a microwave (0.5~10GHz) with ~1KHz square wave.
What is the best way of doing this without using an AM or a pulse function in a microwave sweeper?
I would appreciate if you guys help me with this and especially if you can tell me what kind of microwave component I should use for this.



RE: Amplitude modulation

Given that your modulation is a square wave and only 1 kHz, then you might be able to use a simple switch. By switch I mean a microwave component with SMA input and output connectors, and a terminal for the control signal. You'd have to make sure the one you select is capable of switching at 1 kHz. And this assumes you want 100% modulation depth.


RE: Amplitude modulation

Here's a used one for $550. the hp 11720A series (which I think is good up to 18 ghz).

This is a standard piece of test equipment used to modulate low power RF.

Search for "pin diode modulators" or just find your best deal searching "modulator rental". There's a bunch of rental places that sell modulators at a discount.

If your need is very simple, VE1BLL give a good though. You can find any rf switch, usually pin diode, say from minicircuits.com and purchase it, then just turn it on/off.  Your 10 ghz upper frequency limit can add to the price of the switch so if you don't really have to go that high, the switch will be less cost.

Here's a 0.5-6 ghz switch for $70 from minicircuits. http://www.minicircuits.com/cgi-bin/modelsearch?model=ZFSWA2-63DR%2B&search_type=model


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