Just a bit on Antenna Theory, Hak5 1605 

Loving the curls... Nice explanation guys.

144-148 MHz. = 2 meters 420-450 MHz. = 70 cm 1.2 GHz = 23 cm, or 'L' band 2.4 GHz. = 13 cm or 'S' band

I think its a great piece. Very practical way of teaching. I do not know your targeted audience but I do think you touched so many things in a little time. I recommend that you make series of video on antenna basics for beginners who may be choked at a point with antenna terminologies used in this video.

At 2:30, electrically charged particles do not travel at the speed of light. EM waves travel at the speed of light. Or, if you prefer, photons travel at the speed of light. But matter does not travel at the speed of light.

Awesome videos right before work! Thanks!

I really liked this. I'd be interested in more technical content. Looking forward to more on antennas & radio.

I'll put in another vote for a days worth of radio/antenna/electromagnetic theory. Full understanding of underlying principles is after all the basis for almost all forms of hacking.

Hay Darren, I work a Cell Tower Tech I know a few things about cell towers, that was a grate shot of an LTE tower... there is a Diffrence between a 3G, 4G, and 4G LTE, there is one thing you should know thought if you're that close to a cell tower, your cell phone may not even be using that tower. There is a minimum and maximum distance that each cell site is setup for per the carrier .. For exsample: a cell site in the city, the antenna will most likely be angled to have less distance but a stronger signal becuse that carrier can have more of them but then you could be out on the Highway out in kansas (or Some country side) and be rolling up on a cell site and all of a sudden your call is droped and that would be becuse the antenna's are angled more for distance.. anyways i can talk all day about Cell sites and how they work

I could listen about antennas for hours and hours together!

Awesome episode. Hit on some very good points!

Very informative discussion thankyou!

The more elements you have in front of the driven element, the flatter the transmitted signal becomes, and provides the forward gain of that signal, but as you add more directors, you narrow the RF signal, meaning you must now be more accurate in antenna aiming if you are doing point to point systems, or to a distant receiver, such as a remote mountain site.

I keep hearing him say "Foreign Stints" then realizing he is trying to say "For Instance" - Love the info/show thanks!

Great Job. This is good information.

The sound of balloons getting rubbed into hair, freaks me out, in a "finger-nails down a blackboard" frenzie. aggghhhh. :)

lol. This was cool because I'm an electrical engineering major. Right now we're going into Maxwell's Equations and stuff in physics, so its pretty neat to see some of the physical application of this stuff.

29:32 - He did not answer. She specifically asked how 1/4 wave and 1/2 wave antennas compare to full wavelength antennas... and he shows her a multi-element directional antenna and a rubberduck and asks back which she thinks is best - as if it had anything whatsoever to do with the question.

FM antenna theory, ' Fu**ing Magic' I've always thought of the lobes on a yagi as a booster for the preceding radiating signal. Kind of like how an automatic baseball pitcher launches a baseball going through two spinning wheels. It boosts the signal from the raidoiating source each step and more narrowing beam in the antenna's direction.

The AC wave in a feeder and antenna is 90 degree's out of phase. The RF comes from the current.

Awesome show u guys. i love hak5. now i going to build my own antenna. you give me so mutch inspiration. Ps what small computer are Darren having in front of him? love your show over and oute from sweden

Good job there Darren. I know this is couple years old...and I loved that 2.4 ghz yagi....don't know what that would be good for ..

Super Show! Following... I'm needing to focus all of my equipment; Cell, Modem, Bluetooth (and to try and block some also - neighbors and nighttime FM). Many Thanks.

Is there any really good open source software for designing antennas?

Loving this series!! I'm surprised I haven't seen PhD after Daren's name :)

Such enthusiasm, very knowledgeable and inspiring, wished I had found this sooner. 24 dislikes ! why? balloon phobia?

Isn't 1/2 wave to 5/8th wave optimum for a dipole and a full wave is actually worse?

Wow, Darren is knowledgeable on physics? I thought he was just a coder!

Just to correct about the first woman in space: last name of Valentina is Tereshkova, ending with an 'a' for females. Tereshkov is a male form.

When talking about Yagi antennas, you also need to talk about gain, gain flatness, and beamwidth as it relates to Yagi antenna designs.

hi darren, the half wave antenna is actually the best kind of antennas and that because of the distribution of the electrical field in the antenna, it's at it's peak in the middle of the full wave antenna and at it's minimum in the ends of the antenna.

I came here after watching an old video from the 50s or 60s about antenna principles and operation. It was illustrated, concise, and had good technical information. Then this video started up with balloon antics, exaggerated voices, and generally childish demeanor. I'm not denouncing these things, but... it really brought into focus how times have changed.

I usually am not a fan of Wireless technologies. However, I must recant my words as this has been extremely interesting! Thank you! Keep this up! This is info in a shotgun form! :D

Shannon almost made a dongle joke wend he was talking about the 9 inch ballon.lolz

The best way to represent Electric and Magnetic fields is to think of a chain with links curling each other. Sine wave representations so not give credit to electromagnetic fields, All this linking and curling are described by Maxwell's equations. I like the last equation best as it says it all really and I describe that equation through saying that " The Magnetic filed in a capacitor ( insulation) could be due to a conduction current travelling in copper or a displacement current travelling through the changing electric field,!!" In Motors, transformers we can say that normally the magnetism is due to current travelling in copper while in a capacitor or in radio waves the magnetism works in conjunction with respect to changing electric field and they are all linked as the links in a chain.. Sine waves hardly ever come into it except to model the magnitude of the fields but not their shapes.

Internal antennas found inside many DSL/modem routers and the like, use 'compromise' antennas, while they may be matched to the RF system, they have no effective ERP or EIRP in the given spectrum, and with routers, the 2.4 GHz. 'S' band. I did not include the 5.4 GHz. band for illustration simplicity. Isotropic antennas are the 'imaginary' antennas with which the average dipole radiation pattern is modeled against. The isotropic antenna is the 'perfect' antenna. The dipole has a relative gain of 2.5 dB.

kiddie school for geeks!!yeeeaa!always a good refresh to watch!

Antenna polarization needs to be the same, so if transmitting is horizontal then the receiving end needs to be horizontal as well.

5/8 wave antennas are a good antenna but if your receiving the bigger the antenna the better. But if your transmitting then you need an antenna cut and / or tuned to the frequency or center of the band your operating on. For example for 2.4 GHz wifi you have say 14 channels then you want to design and tune your antenna basically for channel 7. same is true for the 2 meter band where you would tune your antenna to the center point between 144 and 148 MHz or so unless your operating on a specific frequency like commercial radio operators where the FCC assigns them a frequency pair (input and output for duplex and repeater operation or to have a hi and low power channel).

I believe a full wave antenna will have a higher gain over a less than full wave that is oriented/configured in the same way.

26:40 She said fc = λ. It's actually c = λf. Just a minor correction.

Electric field is a vertical representation, while the magnetic field is in the horizontal .E Plane and H plane Sinusoidal patterns. Element coupling of Yagis and Log Periodics. Reflectors, driven elements and directors.

Probably answered many times by now, but if your yagi antenna was flat (horizontal) then your pineapple's omni antennae should be pointed upward or downward. Basically a yagi to omni connection should always be perpendicular.

Have you Talked about Spark gap Radios? If Not you Should. HV + Sparks & Maybe Flames = FUN :)

Time to show an antenna build.. maybe cell some on a small run of builds ..;) Definitely would sell like hot cakes

Dude. I am loveing the theory behind this stuff. Makes me think of the stuff I can add to my RV to make a hack mobile. Already getting A Cell repeater to boost the cell reception when boon docking. Just one question is about health. How far should these thing be from the living space to be "safe". And you just gave me the Idea about getting a Wifi booster to get cell signal from Mc Donalds or some random person internet that is open. PS is there like a coper sheeting I can put on my roof that would help with the safety part? PSS ALso the coper plating would be for more the separation from the receiver and transmitter that would be relativly close prcsimity of the Yami antena and the Pinapel. Also a seperation from the Cell phone booster and my living space since I have read on a few website and the products website that you should have it at least 8 inches from plants and stuff like that.

Hey, so is it possible that I could connect an antenna to an Ethernet cable so I cud connect to the internet like that???

Do you have a tip for good yagi about 14dbi?

So when are Darren and Shannon going to go for there amateur radio licenses to be able to do more with antennas and legally transmit data etc on the GHz bands

15:40 so awkward...

2:52 poor dude got bro-zoned :( Feel ya

You were not supposed to laugh when he said 9" something :D

Has Darren always had the facial hair? He looks a little more Tony Stark in this episode for some reason.

Hey the first woman in space was the boss (Metal Gear).

Maybe you guys should get some copper pipe and make a J-pole antenna for 2 Meters. A friend and I built one for 3 Meters *cough* and it worked really well. ;-)

Darren or Shannon - So what is circular polarization then?

anothher way is to divide freq by 300 and round up or down to get the wavelengh

Lol Shannon "Don't touch it, you'll make it worse"

15:56 "Now I've got a 9 inch.... something"

Awww 802.11ad. Watching from 2020, and not sure that's ever going to be adopted at this point....

everything in the universe has a *potential* charge

electro static field

Flipping the router vertically has more to do with the coverage pattern of the antenna than polarity.

Love the kinky hair

Guys you want to do a show ? look up ( ham radio moon bounce ) Point your antenna at the moon and hear yourself bounce back . 73s KJ4EOZ

If you had a positive charge it means you've lost electrons!

am I the only one who got the 9 inch joke acknowledged by snurbs?

Rubber duck antennae are monopole, not dipole

my bank account has a negative charge, for sure :sigh:

Paper clips have a higher radiation resistance than stainless steel, and are slightly more difficult to provide a proper match to, when using 50 Ohm coaxial cable. F/B ratio is the difference in gain between the driven elements and directors, to the difference of the driven element and the reflector. The difference in rejection ratios between the two are the F/B ratio, or the Front to Back ratio,

Use a n old box spring matrice.....................

Where the comments go??

I'm getting into ham (i'm about to get my technician licence). Could anyone suggest a cheap option for a broke college student. (under $200.00 please) 73

@@@@ DARREN CHICKENS!@@@

Why didn't she correct him and say he's more like 5 inches?

Electrons can not travel at the speed of light.

I want to know how much you smoked before making this one....

Well she's hot, and you rock, Easy to listen too, great 👍 energetic feel. Thanks

I don't like commercials shoved down my throat

Nice video But... this video could have been compressed into 5 minuts. We begginers have still much to learn and time is KNOWLEDGE. Knowledge/ time=IQ

Darren Kitchen needs to dial down his volume - he is trying to hard to get 'in the camera's face'. Like a restaurant, I come here for the 'food' - not the hyper, too chatty 'waiter'.

Boring..

its not physics, its black magic