meljun cortes history of television part 3

8/9/2019 MELJUN CORTES History of Television PART 3

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1

A History of

Radio TechnologyDemystifying Telecommunications

By: Al Klase


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2


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3

What do these Have in Common?


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!nfo"mation#Age Timeline


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$

A %avo"ite &uote

“Any sufficiently advanced technology

is indistinguishable from magic.”

A"thu" C' Cla"() "Profiles of The Future", 1961 (Clarke's third law)

English phsi!ist s!ien!e fi!tion author (191# $ %&&)

nentor of the !o**uni!ations+satellite !on!ept


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*

A +yste"ious %o"ce

, -ta"t at the .eginning, !n the -tone Age

/ -tic(s

/ -tones / Animal 0a"ts


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Am.e"

, atu"ally olyme"i4ed t"ee "esin

, 5"ee(s called it elektron


8/65

6

7lect"ostatic 78e"iments


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9

7lect"ic %ield

ohann Ca"l %"iede"ich

5auss

1#16$$


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1;

The Condense" o" Caacito"

C = Q / V

Q = charge in Coulombs

(6.241506×1018 electrons/C

V = !"# in Volts

-to"es 7ne"gy as elect"ostatic cha"ge'


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Luigi Galvani

(1737-1798)


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12

Alessandro Volta(1745-1827)

Ca' 1


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Ci"cuits and -chematics


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1


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1$

The Comass


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1*

+agnetic %ield due to 7lect"ical Cu""ent

162; # Hans Ch"istian >"sted

And"#+a"ie Am@"e 1$#163*


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1

7lect"o +agnet and !nducto"

oseh Hen"y19 # 166

Ca' 162

Taught and did"esea"ch at

0"inceton'

-to"es ene"gy as a magnetic field'


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16

-amuel +o"ses

Teleg"ah1636Bina"y -e"ial Communications

-eedEell

+o""istoEn'


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19

+a8Eell

ames Cle"( +a8Eell

1631 # 169

Treatise on Ele!tri!it and -agnetis*

163


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2;

+o"e +a8Eell


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21

i


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22

Alte"nating Cu""ent


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23

Fscillation and Gesonance


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2

High#f"euency AC Fscillato"


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2$

Eureka!


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2*

HertzCa. 1888

Hein"ich He"t4

16$ # 169


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2

The %i"st Gadio Geceive"


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26

A He"t4ian 78e"iment

%"om nention nnoation

in the .adio ndustr)

W' Gue"t +ac=au"in) 199


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290H4 I etahe"t47h4 I e8ahe"t4


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3;

-atellite TJ Wi%i) Bluetooth

Cellhones

-atellite TJ50-

-ho"t#Wave

B"oadcast


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0"oagation +odes

Di"ect#Wave

All re"uencies


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0"oagation +odes

5"ound#Wave

E#$%#$#$&

'elo( )* H+ , ) &Hz

0 ti + d


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0"oagation +odes

-(y#Wave

&$H -%H $ )** /Hz , )* &Hz

, Can alloE glo.al oint#to#oint communications and ."oadcasting

, Ja"ies Eith:

%"euency

Time of day

-eason

-ola" activity 11#yea" Cycle


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3

$%&'2


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3$

5uglielmo +a"coni

,Bo"n 16,Wealthy !talian fathe" ,Wealthy !"ish mothe" amison,Tech' !nstitute at =egho"n

included teleg"ahy,!nsi"ed .y He"t4s F.itua"y in 169


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3*

+a"coni

at Jilla 5"ifone

0hotos and d"aEings f"om Earl .adio

.y 0ete" G' ensen


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+a"coni Develoments

,169* +oves to 5"eat B"itain,-et' 169*) 2'6Km) -alis.u"y 0lain,+a"' 9) 1Km) B"istol Channel,=ate 1696) 29Km) !sle of W"ight


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+a"coni 169*


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0atent Alication filed 12 A"il 19;;

%"om The /onders of /ireless Telegraph

' A' %leming) =ondon) 1913

0 i G i


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1

0assive Geceive"s


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The %leming Jalve

John AmbroseFleming3

(1849 - 1945)


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3

We need a"elia.le

Amlifie"


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$

The Audion

#ee 0eforest

19;*


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An Audion Gadio Geceive"

A


47/65

A"mst"ong

7dEin HoEa"d A"mst"ong


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6

The Gegene"ative Ci"cuit

“1reat am2lificationobtained at once!”


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9

Gegen 0"ototye

Demonst"ated to-a"noff at the

+a"coni station at

Belma"

di l h


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$;

Gadiotelehone

h i h f d i


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$1

The Bi"th of B"oadcasting

Ti li


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$2

Timeline


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=% = %


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$

=% I =oE %"euency

1000 m

300 KHz30 KHz

10 Km

FREQUENCY

WAVELENGTH

200 KHz

=ong#Wave B"oadcast

16'$ to 263'$ KH4

Ai"c"aft Beacons

LAtomicM Cloc(s *;KH4

+% + di %


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$$

+% I +edium %"euency

1000 m

3 MHz300 KHz

10 Km

FREQUENCY

WAVELENGTH

2 MHz

L-tanda"dM A+ B"oadcast

$; to 1;; KH4

Ai"c"aft

Beacons

1000 KHz

1*; +

Ham

H% Hi h %


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$*

H% I High %"euency

1000 m

30MHz3 MHz

10 Km

FREQUENCY

WAVELENGTH

20MHz

-ho"t#Eave B"oadcast

10 MHz

Ham

JH% J Hi h %


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$

JH% I Je"y High %"euency

1000 m

300 MHz30 MHz

10 Km

FREQUENCY

WAVELENGTH

200 MHz

TJ

2#*

100 MHz

Ham

TJ

#13

%+ B"oadcast

NH% Nlt Hi h %


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$6

NH% I Nlt"a#High %"euency

1000 m

3 GHZ300 MHz

10 Km

FREQUENCY

WAVELENGTH

2 GHz

NH% TJ

1000 MHz

Keyless 7nt"y 31$ +H4

Analog Cell 0hone

Wi%i etc' 2' 5H4

Digital Cellhone

50- 1'$$ 5H4

NH% Nlt Hi h %


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$9

NH% I Nlt"a#High %"euency

1000 m

3 GHz300 MHz

10 Km

FREQUENCY

WAVELENGTH

2 GHz1 GHz

Ham

TJ

1#92

%+ B"oadcast


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*;

Geeating He"t4s 78e"iments

T"ansmitte" Geceive"

+atching

T"ansfo"me"


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*1

T"ansmission



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*3

-tanding Waves



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-tanding Waves

htt:OOen'Ei(iedia'o"gOEi(iO-tandingPEave

http://en.wikipedia.org/wiki/Standing_wavehttp://en.wikipedia.org/wiki/Standing_wave


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Calculations

λ lam.da Wavelength I C -eed of =ight O %"euency

F

C =λ

F C ∗= λ

meljun cortes history of television part 3

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