The capacitor HAS to be local to get around wire inductance.
OK, now you have some switched power, what generates the RF?
Where do you put the receive antenna(s) if this thing is also a radar?
Matter of fact, where do you put any of this stuff? There isn't that much forward looking surface on a fighter.
I'm not holding my breath.
-- Jim Pennino Remove .spam.sux to reply.
The military reference says that they power and store the energy beam equipment with resources that are used for VTOL hardware in other models.
Wires have less inductance if they are really short.
Don't know
Pulse radars use the same antenna to send and receive.
Put it under a streamlined radome.
You got to be some kind of genius to do an average power calculation like that, you know that? I could understand if you were really really old like say 67 or more:-)
Arny Krueger snipped-for-privacy@hotpop.com posted to sci.electronics.design:
It is energy or power that fries the semiconductors more than voltage per se.
Nonsense, i have worked on projects with feeds in the 500 kVA to
5000 kVA range, they all were fed from the local utility at medium voltage or 480/277 3-phase. They build generating plants at the 1000 MVA range (about 1000 times larger). This is excepting co-generation where the idea is to make use of otherwise waste gasses.
Switched power *is* RF!
John
Arny Krueger snipped-for-privacy@hotpop.com posted to sci.electronics.design:
AN/SPG-51 and AN/SPG-53 tracking / target illumination radars were/are rated at 22.5 kW continuous and 35 kW continuous. They were real good at knocking birds out of the sky.
It is current, just like with humans, just like with ESD.
With humans, the current required to fibrillate the heart.
With ESD, the current applied to a single PN junction.
With a high frequency receiver front end, the current required to fry a single component.
It doesn't matter what the transport mechanism is, Voltage, Power, etc.
All that matters is what current gets applied to a device that has a limitation on said current.
snipped-for-privacy@specsol.spam.sux.com snipped-for-privacy@specsol.spam.sux.com posted to sci.electronics.design:
What waveguides? The emitter is a phased array antenna; 300,000 phase synchronized small sources.
No shit?
Yeah, but the implication was the little 4 inch dodad was a megawatt source. Now it's a receiver front end too?
Not a lot of area there for gigawatts.
-- Jim Pennino Remove .spam.sux to reply.
Ummm, no.
Switched power is just switched power.
There has to be a microwave RF generator somewhere.
-- Jim Pennino Remove .spam.sux to reply.
OK, so you have 300,000 RF sources closely coupled to 300,000 RF sources, each running 3.3 kW to get a gigawatt.
Arranged in a square, that's roughly 547 X 547 sources.
At 4 inches per source, that's 2188 inches, or 182 feet by 182 feet.
That's some fighter.
-- Jim Pennino Remove .spam.sux to reply.
The JSF is reported to hit a lot of things. From the webpage
The JSFs advanced airframe, autonomic logistics, avionics, propulsion systems, stealth, and firepower will ensure that the F-35 is the most affordable, lethal, supportable and survivable aircraft ever to be used by so many warfighters across the globe.
I've hardly ever read a longer catenation of random attributes. I don't know about the radar, but at least the webpage is a terawatt hot air blower.
robert
60.
As was the similar HIPIR. They appear to be roughly contemporaneous. I once ran into a Navy guy who worked on the shipboard CW fire control radars in the day, and the similarities seemed to abound. However, I see only one parabola in pictures of the radar's antenna on ships. The Hawk HIPIR had separate parabolas for transmitting and receiving.
In the field as I knew it in the Army, there was no local utility... ;-)
Google "uwb transmitter".
Good grief.
John
It's a cool gadget, and that stuff is mostly true. It goes supersonic on a single engine without afterburner, and it can take off and land vertically. That's going to change a lot of things, like airfields and carriers. I know some of the guys who are working on it, and they're very good.
John
A phased array requires precise phase (or frequency) control of the emitters to do the beam forming and aiming.
How does one do that with a "uwb transmitter"?
-- Jim Pennino Remove .spam.sux to reply.
Since none of the claimed properties so far will pass a back of the envelope sanity check, it appears all the capability is in the marketing brochures.
-- Jim Pennino Remove .spam.sux to reply.
Timing.
John
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