This paper presents a waveguide slit array antenna with high gain and narrow beamwidth. This antenna is formed by subwavelength slits surrounded with periodic grooves. The far field radiation characteristics of the improved antenna are investigated. Simulation results show that the gain of the antenna with a designed working frequency is improved by 11dB and a strong beam can be obtained. The physical mechanism for the performance improvement is governed by the resonance excitation of surface electromagnetic waves and can be well described by the coherent superposition of power radiated from the grooves and central slits.

Topics
Plasmons, Electromagnetism, Wave mechanics, Antennas, Radiowave and microwave technology, Wireless communications, Microwave radiation, Finite difference methods, Diffraction theory
1.
H. A.
 
Bethe
,
Phys. Rev.
https://doi.org/10.1103/PhysRev.66.163
 
66
,
163
(
1944
).
Google Scholar
Crossref
Search ADS
 
2.
H. J.
 
Lezec
,
A.
 
Degiron
,
B.
 
Devaux
,
R. A.
 
Linke
,
L.
 
Martín-Moreno
,
F. J.
 
García-Vidal
, and
T. W.
 
Ebbesen
,
Science
https://doi.org/10.1126/science.1071895
 
297
,
820
(
2002
).
Google Scholar
Crossref
Search ADS
PubMed
 
3.
T. W.
 
Ebbesen
,
H. J.
 
Lezec
,
H. F.
 
Ghaemi
,
T.
 
Thio
, and
P. A.
 
Wolff
,
Nature (London)
https://doi.org/10.1038/35570
 
391
,
667
(
1998
).
Google Scholar
Crossref
Search ADS
 
4.
L.
 
Martín-Moreno
,
F. J.
 
García-Vidal
,
H. J.
 
Lezec
,
A.
 
Degiron
, and
T. W.
 
Ebbesen
,
Phys. Rev. Lett.
https://doi.org/10.1103/PhysRevLett.90.167401
 
90
,
167401
(
2003
).
Google Scholar
Crossref
Search ADS
PubMed
 
5.
F. J.
 
García-Vidal
,
H. J.
 
Lezec
,
T. W.
 
Ebbesen
, and
L.
 
Martín-Moreno
,
Phys. Rev. Lett.
https://doi.org/10.1103/PhysRevLett.90.213901
 
90
,
213901
(
2003
).
Google Scholar
Crossref
Search ADS
PubMed
 
6.
T.
 
Thio
,
K. M.
 
Pellerin
,
R. A.
 
Linke
,
H. J.
 
Lezec
, and
T. W.
 
Ebbesen
,
Opt. Lett.
 
26
,
1972
(
2001
).
Google Scholar
Crossref
Search ADS
PubMed
 
7.
H.
 
Caglayan
,
I.
 
Bulu
, and
E.
 
Ozbay
,
Microwave Opt. Technol. Lett.
https://doi.org/10.1002/mop.22015
 
48
,
2491
(
2006
).
Google Scholar
Crossref
Search ADS
 
8.
S. S.
 
Akarca-Biyikli
,
I.
 
Bulu
, and
E.
 
Ozbay
,
Appl. Phys. Lett.
https://doi.org/10.1063/1.1783013
 
85
,
1098
(
2004
).
Google Scholar
Crossref
Search ADS
 
9.
M. J.
 
Lockyear
,
A. P.
 
Hibbins
, and
J. R.
 
Sambles
,
Appl. Phys. Lett.
https://doi.org/10.1063/1.1688001
 
84
,
2040
(
2004
).
Google Scholar
Crossref
Search ADS
 
10.
M.
 
Beruete
,
I.
 
Campillo
,
J. S.
 
Dolado
,
J. E.
 
Rodríguez-Seco
,
E.
 
Perea
, and
M.
 
Sorolla
,
IEEE Antennas Wireless Propag. Lett.
 
3
,
328
(
2004
).
Google Scholar
Crossref
Search ADS
 
11.
C.
 
Wang
,
C.
 
Du
,
Y.
 
Lv
, and
X.
 
Luo
,
Opt. Express
https://doi.org/10.1364/OE.14.005671
 
14
,
5671
(
2006
).
Google Scholar
Crossref
Search ADS
PubMed
 
12.
M.
 
Beruete
,
I.
 
Campillo
,
J. S.
 
Dolado
,
J. E.
 
Rodríguez-Seco
,
E.
 
Perea
,
F.
 
Falcone
, and
M.
 
Sorolla
,
IEEE Antennas Wireless Propag. Lett.
 
4
,
365
(
2005
).
Google Scholar
Crossref
Search ADS
 
© 2007 American Institute of Physics.
2007
American Institute of Physics
You do not currently have access to this content.