ADVANCED DEVELOPMENTS IN RADAR
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11111111111111111111111111111111111111111111111111111111111111111111111111111
Da abase O “In Vi o”
Measu emen s o Quan i a i e
Mic owa e Imaging and
Recons uc ion Algo i hms
A ailable
[Edi o ’s no e The a ailabili y o he ollowing expe imen al da a,
app op ia e o use in es ing quan i a i e imaging and econs uc-
ion algo i hms, was announced a he join
AP-S/URSI-AB
Special
Session on “Image Recons uc ion om Real Da a,” o ganized a
he Newpo Beach Symposium by Bob McGahan, Ralph
Kleinman, and Mike Fiddy The da a se used as a common es o
he algo i hms discussed- he so-called “Ipswich Da a”-may s ill be
a ailable om Bob McGahan (see his add ess, e c in he Chap e
News column in his issue) Such da a se s, pa icula ly when based
on ca e dly made and documen ed measu emen s, a e e y aluable
o es ing bo h di ec - and in e se-sca e ing p edic ion and econ-
s uc ion algo i hms The
Mngnzim
in i es hose wo ke s who ha e
such da a se s, and a e willing o sha e hem,
o
submi an
announcemen and desc ip ion, such as ha gi en below, o publi-
ca ion in he Mngnz iie
WRS]
Wo ke s
in
Spain and F ance ha e de eloped equipmen and a
se ies o econs uc ion algo i hms o mic owa
poses Special a en ion has been de o ed in hi
in asi e con ol o deep hype he mia ea men s
a e cu en ly engaged in a p og am aiming o in
ci cula scanne o he coaxial TEM applica ion
Hospi al o U ech
(NL)
Bo h g oups ha e de elo
al p o o ypes, namely a plana -mic owa e came a
[
F ance, and a ci cula scanne ,
in
Spain [2] They ha e also de el-
oped he co esponding omog aphic- econs uc ion algo i hms o
quali a i e spec al and quan i a i e spa ial i e a i e pu poses
[3-51
As a esul , a se ies o simula ed and measu ed da a a e a ailable I
seems in e es ing o ex end hese da a o o he wo ke s o assess-
ing he o e all obus ness o quan i a i e econs uc ion algo i hms
A p esen , his da abase con ai
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1991) eady
IEEE
An ennas and P opaga ion Magazine,
Vol.
37,
No.
5,
Oc obe
1995
87
200
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BRAGREG.ASC
Each o he iles wi h he .ASC ex ension a e sca e ed ields meas-
u ed in he cylind ical sys em. The da a
in
FANTCENT.ASC we e
ob ained om a phan om consis ing
o
wo Plexiglas cylinde s,
illed wi h di e en concen a ions
o
e hyl alcohol,
as
explained
below. Dimensions a e zi en in millime e s. Figu es
1
and
2.
show
he phan om o which he measu emen s we e aken, and a econ-
s uc ion ob ained om
i
Cylinde
A
was illed wi h
a
96%
solu-
ion o e hyl alcohol, wi h
E*
=
10.-j8.3.
Cylinde B was illed wi h
a 4% e hyl alcohol solu ion, wi h
E*=
73.-jl1. The da a in
BRAGREG.ASC we e aken om a human o ea m.
File o ma
All
da a lies con ain a ma ix o 64
x
64 complex da a alues.
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w i en
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unc ion, and
,u0
is
he acuum pe meabili y
The ci cula a ay
is
composed
o
64 de ec o s. Hence, a
maximum o 64 iews can be used o he econs uc ion. A iew is
ob ained by using one an enna as an emi e , and 33 as ecei e s
loca ed on he opposi e side,
on
a semici cle, as shown in Figu e
3.
The adius
o
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is
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and
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1.
The phan om used o he measu emen s.
TS5.C
+
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-
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CHZ
spa ial es
.
A=3
5mm
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2.
A
econs uc ion ob ained om he phan om da a.
4
Figu e
3.
The a angemen o he ansmi ing
and
ecei ing
an enna loca ions a ound he phan om.
No e
ha
when each
an enna
is
used
as
a
ansmi e ,
33
o he an ennas a e used
as
ecei e s.
he complex pe mi i i y
o
wa e a
25"
C
is
aken o be
77.3
-
j8.66
.
Re e ences
1
J
Ch Bolomey, Ch Picho , "Mic owa e omog aphy
om
he-
o y
o p ac ical imaging sys ems,"
I~i eenm o~ml
Jozinml
o
hag-
ig
Sys enis
Tech iology,
2,
1990, pp 144-156
88
IEEE
An ennas and P opaga ion Magazine,
Vol.
37,
No.
5,
Oc obe
1995
2.
A.
B oque as, J. Romeu e al., “Cylind ical Geome y:
A
Fu he
S ep in Ac i e Mic owa e Tomog aphy,”
IEEE
T ansac ions on
Mic owme
Theo y
aiid
Techniques,
MTT-39,
5,
May 1991, pp.
836-844.
3.
J.
M.
&us,
Ch. Pieho ,
L.
Jo e, J. Ch. Bolomey,
N.
Joachimowicz, A.B oque as,
M.
Fe ando, “Plana and cylind ical
ac i e mic owa e empe a u e imaging.
Niiniei?cal
siimiln ions,
”
ZEEE
T aiisac iom
on
Medical
Iimgiiig,
11,
4, Decembe 1992,
pp. 457-469.
4.
A.
B oque as, J. J. Mallo qui e al., “Ac i e Mic owa e Sensing
o Highly Con as ed Dielec ic Bodies,”
Joimal
o
EM
Wa es
aid
Applica ioils,
7,
11, No embe 1993, pp. 1439-1453.
5
N.
Joachimowicz, Ch Pieho , J P Hugonin, “In e se sca e ing
an i e a i e nume ical me hod o elec omagne ic imaging,”
ZEEE
T ansaclioin
on
Aii e 7iins
a id
P opaga ion,
AP-39,
12, Decembe
1991, pp 1742-1752
Jo di J. Mallo qui
G up
A.
M.
R.,
Depa men o Signal Theo y and Communica ions
Uni e si a Poli ecnica de Ca alunya
C/
G an Capi a s/n, D3
08034 Ba celona
Spain
E-mail: [email p o ec ed]
N.
Joachimowicz,
J.
Ch. Bolomey
[email p o ec ed]
G oupe de Elec omagne isine
Ecole Supe ieu e d’Elec ici e
Pla eau du Moulon,
91
190 Gi -su -Y e e
F ance
E-mail: [email p o ec ed]
SLJPELECLSS
An oni P. B oque as
G up A. M. R.,
Depa men o Signal Theo y and Communica ions
Uni e si a Poli ecnica de Ca alunya
C/
G an Capi a s/n,
D3
08034
Ba celona
Spain
111111111111111l1111lllllllllllllllllllllllllllllllllllllllllllllllllllllllll
Repo on
15 h
In e na ional
Symposium on
Elec omagne ic Theo y
E e y h ee yea s, Commission
B
o
URSI
(Fields and
Wa es) o ganizes a symposium dedica ed o he heo y o elec o-
magne ism I is he leading e en -wo ldwide, bu o he US- o
all esea che s ac i e in he ield The 15 h symposium was held in
Sain Pe e sbu g, Russia, May 23-26, 1995 This yea ’s e en was
o med om 32 sessions, which co e ed he ollowing main a eas
Wa e p opaga ion in
a
wide a ie y o media, linea and nonlinea ,
aniso opic and bi-aniso opic, chi al, composi e, wi h pe iodic and
s ochas ic inhomogenei ies, enclosed wi hin wa eguides, e c.;
Fo wa d and in e se sca e ing, including mic owa e imaging,
wi h a ious kinds o e lec ing obs acles and su aces;
Compu a ion echniques: nume ical, asymp o ic, FDTD, ansien
esponses;
Basic elec omagne ic heo y;
Mos a ie ies o an ennas: ape u es, ho ns, e lec o s, slo s,
pa ches, dipoles, a ays, esona o s, oge he wi h analysis and
syn hesis echniques
The e en las ed ou days, wi h ou mo ning and a e noon
sessions in pa allel, including wo pos e sessions The Technical
P og am Commi ee had selec ed some 300 pape s among he 456
p oposed con ibu ions Pa icipan s, numbe ing 349, came om
38
coun ies Among hem we e 25 “young scien is s,” suppo ed by
URSI
( he In e na ional Radio Scien i ic Union)
The e we e many no el and o iginal p esen a ions, and
I
in i ed se e al au ho s o p epa e su eys abou hei ac i i ies o
ea u e a icles
in
his
Magazi ie.
The book o P oceedings-849
pages hick-con ains a weal h o in o ma ion ha would be di icul
o ind elsewhe e, co e ing, in pa icula , o iginal de elopmen s
made in CIS ins i u ions (o de s can be placed wi h P o esso Da id
Ol e , E-mail: [email p o ec ed]
).
The decision o o ganize he 15 h symposium in Russia was
made du ing he 1992 symposium, in Sydney, in he hope o p o-
mo ing be e ela ionships wi h Russian colleagues. Since mos o
hese only ha e limi ed means o a el, i was el sui able
o
go
he e and isi wi h hem he nex ime. The scheme was pa ially
success ul. I was possible, in his way,
o
a ac mo e pa icipan s
om Russia and he CIS o he symposium, and hus o es ablish
con ac s which would be di icul o ealize o he wise.
Howe e ,
in
he p esen economic si ua ion, e en a el om
Moscow o S Pe e sbu z, and lodging du ing he symposium,
we e oo expensi e o many, and a numbe o Russian au ho s
could no make i - he si ua ion being e en wo se o Uk aine and
Bela us con ibu o s Sala ies in he ange
$100
o $200 pe mon h
a e no uncommon o enginee s and academic pe sonnel, and hey
a e o en a e paid a e long delays
As
usual, some pe sons seem o
manage much be e han o he s
The Symposium was o ha e aken place a he Palace o
F iendship, on he sho e o he Fon anka (one o he mos amous
canals o S Pe e sbu g), and close o he Ne ski P ospek
(a enue), he main shopping a e y o he ci y Un o una ely,
because o he ho endous a es eques ed ($10,000 o he ou
days o he symposium), an al e na e acili y had
o
be ound Ou
Russian colleagues p o ed mos e ec i e in loca ing one, ob aining
om he Ci y o S Pe e sbu g he ee use o he necessa y mee -
ing and dining ooms in he his o ical and monumen al “Smolny”
building This was a i s a boa ding school o gi ls o noble ami-
lies, becoming much la e he i s headqua e s o Lenin
A
huge
pain ing o Lenin s ill ado ns he main mee ing hall,
in
which all he
plena y sessions we e held No
so
long ago, i would ha e been
impossible o a o eigne o en e his adminis a i e building and,
s ill now, s ic secu i y measu es a e en o ced pa icipan s had
be e no ha e o go en hei au ho iza ion, isa, and passpo
whene e en e ing, and also when exi ing, he building
IEEE
An ennas and P opaga ion Magazine,
Vol.
37,
No.
5,
Oc obe
1995
89