5th Annual Contest 2003

From: "TheDAG" <studantATeeD0TduthD0Tgr>

To: <antennasATeeD0TduthD0Tgr>

Subject: 5th Annual Antennas Design Contest 2003

Date: Friday, July 25, 2003 2:26 AM

[Please Use Fixed-Space Font and 132 Characters per Line]

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Antennas Newsletter #15 - Friday 25 July 2003

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Antennas e-Class News by e-mail to registered Students,

Friends and other Outsiders!

* * * * * * * * * * * * * * * * * * * * * *

* SXEDIASMOS KERAIWN *

* 5os ETHSIOS FOITHTIKOS DIAGWNISMOS 2003 *

* * * * * * * * * * * * * * * * * * * * * *

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[I] SYMMETOXH

=============

STO DIAGWNISMO:

KALOYNTAI NA SYMMETASXOYN

OLOI OI FOITHTES HMMY/DP8 TOY MA8HMATOS

"KERAIES II: SYN8ESH, SXEDIASMOS",

TOY TREXONTOS AKADHMA'I'KOY ETOYS 2002-2003,

PROS APODEI3H THS PROSKTH8EISHS DE3IOTHTOS.

PROSKALOYNTAI NA SYMMETASXOYN

OLA TA MELH TOY IEEE THRACE SB,

EFOSON DEN YPHR3AN FOITHTES

TOY, WS ANWTERW, MA8HMATOS.

============

[II] TO 8EMA

============

H PARASTASH EIKONIKHS PRAGMATIKOTHTAS:

http://antennas.ee.duth.gr/a2contest2003/vrmlantgeo.wrl

PAROYSIAZEI MIA KERAIA

POY EXEI TH MORFH

SYSTOIXIAS TYPOY

"Yagi-Uda".

ESTW OTI

H KERAIA AYTH

EXEI TA AKOLOY8A XARAKTHRISTIKA:

OLA TA STOIXEIA THS KERAIAS

EINAI DIPOLA

"LAMDA DEYTERA".

TA DIPOLA AYTA

EINAI OLA PARALLHLA PROS

THN EY8EIA TOY A3ONOS x'Ox.

TA EPIPEDA

xOy KAI

yOz

EINAI EPIPEDA

SYMMETRIAS THS SYSTOIXIAS.

ANALYTIKOTERA,

STO SXHMA:

http://antennas.ee.duth.gr/a2contest2003/figantgeo.gif

DIAKRINONTAI TA E3HS:

MIA OMADA DIPOLWN

'A' H OPOIA APOTELEITAI APO TA

2 PARASITIKA DIPOLA

'A1','A2'.

MIA OMADA DIPOLWN

'B' H OPOIA APOTELEITAI APO

4 SYGRAMMIKA PARASITIKA DIPOLA - ANAKLASTHRES

'B1', 'B2', 'B3', 'B4',

ME SXEDON SYMPIPTONTA

TA AKRA TWN ZEYGWN TWN DIPOLWN

'B1'-'B2',

'B2'-'B3', STO O, KAI

'B3'-'B4'.

MIA OMADA SYGGRAMMIKWN DIPOLWN

'C' H OPOIA APOTELEITAI APO

1 ENERGO DIPOLO

'E' POY PERIBALLETAI APO

2 PARASITIKA DIPOLA

'P1','P2'.

TA ZEYGH TWN DIPOLWN

('P1','E') KAI

('E','P2')

EXOYN SXEDON SYMPIPTONTA AKRA.

ENA DIPOLO - KATEY8YNTHRA

'K'.

===============

[III] TO ZHTHMA

===============

ME XRHSH TWN EFARMOGWN LOGISMIKOY

"TheDAG mini-Suite of Antenna System Design Tools":

http://antennas.ee.duth.gr/a2contest2003/TheDAGmini-Suite/

NA PRAGMATOPOIH8EI

ENAS BELTIWMENOS SXEDIASMOS THS KERAIAS,

METAKINWNTAS KAI TOPO8ETWNTAS KATALLHLA

TIS OMADES

'A',

'C'

KAI TON KATEY8YNTHRA

'K',

ENTOS ENOS NOHTOY OR8OGWNIOY PARALLHLEPIPEDOY

ME DIASTASEIS,

2.0 LAMDA, WS PROS TON A3ONA x'Ox,

1.5 LAMDA, WS PROS TON A3ONA y'Oy, KAI

1.0 LAMDA, WS PROS TON A3ONA z'Oz,

ETSI WSTE

'A1' KAI 'A2',

NA EXOYN ALGEBRIKH PROBOLH STON y'Oy

MIKROTERH EKEINHS TOY

'K'

KAI

*XWRIS*

NA PARABIAS8OYN TA XARAKTHRISTIKA [II.2] KAI [II.3],

H KERAIA NA EMFANISEI,

ME STROGGYLOPOIHSH TWN APOTELESMATWN,

SE DYO KLASMATIKA DEKADIKA yHFIA,

DI'EFARMOGHS TOY KANONA "4/5":

DIAGRAMMA AKTINOBOLIAS

ME KYRIO MEGISTO

EPI TOY 8ETIKOY HMIA3ONA Oy

TH MEGALYTERH,

KATA TO DYNATON,

KATEY8YNTIKOTHTA D,

KAI

TO MIKROTERO, KATA TO DYNATON, METRO,

THS DIAFORAS THS MIGADIKHS ANTISTASHS EISODOY

Zinp

APO THN TYPIKH TIMH

THS XARAKTHRISTIKHS ANTISTASHS GRAMMHS METAFORAS

50 [Ohm],

S = |Zinp - 50|.

========================

[IV] KATA8ESH SYMMETOXWN

========================

H SYMMETOXH SYNISTATAI STHN KATA8ESH:

GRAPTHS ANALYTIKHS EK8ESHS TOY SXEDIASMOY

KAI

DISKETAS 3.5"/ 1.44 MB

ME *OLA* TA APAITOYMENA,

PROS ELEGXO TWN APOTELESMATWN,

ARXEIA.

H KATA8ESH SYMMETOXWN

MPOREI NA PRAGMATOPOIEITAI

EWS KAI THN

PARASKEYH 26H SEPTEMBRIOY 2003,

WRA 14:00,

STO GRAFEIO 33A

TOY KTIRIOY ERGASTHRIWN HMMY.

STHN PERIPTWSH POY YPAR3OYN

DYO 'H PERISSOTERES

EGKYRES SYMMETOXES ME

*AKRIBWS* "IDIES KERAIES"

TOTE

OI SYMMETOXES AYTES

AKYRWNONTAI,

DEN KATATASSONTAI

KAI KALOYNTAI OI ENDIAFEROMENOI

NA KATA8ESOYN,

EFOSON TO EPI8YMOYN,

ENTOS 3 HMERWN,

NEES SYMMETOXES.

AN KAI TH FORA AYTH

PROKyYOYN

*AKRIBWS* "IDIES KERAIES",

TOYTO SYNEPAGETAI

THN ORISTIKH AKYRWSH TWN SYMMETOXWN AYTWN.

============

[V] KATATA3H

============

KA8E SYMMETOXH POY PLHROI

TIS APAITHSEIS

[II] KAI [III.0]

8EWREITAI WS

"EGKYRH".

PRWTA,

SYNTASSONTAI DYO 3EXWRISTES

KATATA3EIS TWN EGKYRWN SYMMETOXWN

POY EKKINOYN APO TO 1

KAI

EITE KATALAMBANOYN BA8MIAIA TIS 8ESEIS:

d, KA8WS MEIWNETAI TO D,

KAI

s, KA8WS AY3ANEI TO S

EITE KATALAMBANOYN THN IDIA 8ESH

d 'H s

EFOSON EMFANIZOYN

TA IDIA

D 'H S,

ANTISTOIXWS.

YSTERA,

YPOLOGIZETAI GIA KA8E SYMMETOXH

TO A8ROISMA TWN 8ESEWN

t = d + s

TO OPOIO KAI ORIZETAI WS

O BA8MOS t TOY SXEDIASMOY.

ME BASH TOYS BA8MOYS t

GINETAI MIA

ARXIKH KATATA3H SE 8ESEIS k.

TELIKA,

OI EGKYRES SYMMETOXES

KATATASONTAI ORISTIKA SE 8ESEIS K,

POY EKKINOYN APO TO 1

KAI AY3ANOYN AY3ANOMENOY TOY BA8MOY t,

LAMBANONTAS YP'OyIN

KAI TIS AKOLOY8ES

3 PERIPTWSEIS t ISOBA8MIAS:

(1)

ME DIAFORETIKA s:

ORIZETAI OPWS

OI ANTISTOIXES 8ESEIS K' THS KATATA3HS

AY3ANOYN

KA8WS AY3ANEI TO s.

(2)

ME ISA s,

ENNOEITAI APO DIAFORETIKES KERAIES:

PRAGMATOPOIEITAI,

PAROYSIA TWN ENDIAFEROMENWN,

KLHRWSH

GIA TIS ANTISTOIXES 8ESEIS K'' THS KATATA3HS.

(3)

SE PERIPTWSH POY SYNYPARXOYN

KAI OI DYO PROHGOYMENES PERIPTWSEIS

EFARMOZETAI KATA PROTETAIOTHTA H (1)

PARADEIGMA:

O PARAKATW PINAKAS KATADEIKNYEI

TO TROPO DIAMORFWSHS

THS ORISTIKHS KATATA3HS

STHN PARADEIGMATIKH PERIPTWSH

6 EGKYRWN SYMMETOXWN SXEDIASMOY KERAIWN:

KERAIA : D, S => d + s = t : k, s => K', K'' : K

--------------------------------------------------------

ALPHA : 5, 3 => 3 + 2 = 5 : 1 , 2 => 1 : 1

BETA : 2, 4 => 4 + 4 = 8 : 6 : 6

GAMMA : 2, 3 => 4 + 2 = 6 : 4 : 4

DELTA : 6, 4 => 1 + 4 = 5 : 1 , 4 => 2 , 2 : 2

EPSILON : 1, 1 => 6 + 1 = 7 : 5 : 5

ZETA : 6, 4 => 1 + 4 = 5 : 1 , 4 => 2 , 3 : 3

META THN ORISTIKH KATATA3H

SYNTASSONTAI DYO 3EXWRISTOI PINAKES

KATATA3HS TWN EGKYRWN SYMMETOXWN

POY AFOROYN TIS ANTISTOIXES

DYO KATHGORIES TWN DIAGWNIS8ENTWN

[I.A],[I.B]

===============

[VI] TA BRABEIA

===============

SYMFWNA ME TON ANWTERW

PINAKA KATATA3HS TWN EGKYRWN SYMMETOXWN

TWN FOITHTWN TOY MA8HMATOS

APONEMONTAI TA AKOLOY8A BRABEIA:

PRWTO BRABEIO

A. BEBAIWSH PRWTEYSANTOS SXEDIASMOY

B. THN TREXOYSA, ETHSIA, 80-H EKDOSH TOY BIBLIOY

The ARRL Handbook for Radio Communications,

2003,

80th Edition,

Since 1926.

http://www.arrl.org/catalog/?item=1921

KAI

C. MIA 6-MHNH SYNDROMH STO IEEE THRACE SB.

http://lists.duth.gr/mailman/listinfo/ieee

DEYTERO EWS KAI DEKATO BRABEIO

MIA 6-MHNH SYNDROMH STO IEEE THRACE SB.

SYMFWNA EPISHS ME TON ANWTERW

PINAKA KATATA3HS [V]

TWN EGKYRWN SYMMETOXWN

TWN MELWN TOY IEEE THRACE SB

APONEMETAI,

EFOSON O PRWTEYSAS SXEDIASMOS PERILAMBANETAI

MESA STIS 11 PRWTES 8ESEIS THS ORISTIKHS KATATA3HS,

ENA BRABEIO

MIA 6-MHNH SYNDROMH STO IEEE THRACE SB

TA APOTELESMATA TOY DIAGWNISMOY

8A ANAKOINW80YN TH

DEYTERA 6 OKTWBRIOY 2003

KAI

H APONOMH TWN BRABEIWN 8A GINEI

ENTOS TOY OKTWBRIOY 2003.

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[VII] BRABEIA PROHGOYMENWN DIAGWNISMWN

======================================

4os DIAGWNISMOS - 2002

PRWTO BRABEIO:

Ka BASILIKH MHTRAKA

3os DIAGWNISMOS - 2001

PRWTO BRABEIO:

Kos XRHSTOS KOYTSOS

2os DIAGWNISMOS - 2000

http://antennas.ee.duth.gr/ftp/contest2ooo/

PRWTO BRABEIO:

Kos OSMAN OSMANOGLOU

1os DIAGWNISMOS - 1999

http://antennas.ee.duth.gr/contest1999/default.htm

PRWTO BRABEIO, E3 HMISEIAS:

Kos KWNSTANTINOS KONDYLHS

Kos NIKOLAOS PAPAGEWRGIOY

TRITO BRABEIO:

Kos LAMPHS-DHMHTRIOS MIXALOPOYLOS

http://antennas.ee.duth.gr/contest1999/presentationday/presentationday.htm

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[VIII] EPIKOINWNIA

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DIEYKRINISEIS:

studantATeeD0TduthD0Tgr

TheDAG