Frequency-agile, polarization diverse microstrip antennas and ...
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United States Patent [191
[111
4,367,474
Schaubert et al.
[45]
Jan. 4, 1983
[54]
FREQUENCY-AGILE, POLARIZATION DIVERSE MICRQSTRIP ANTENNAS AND
4,053,895 10/1977 Malagisi ............. .. 343/700 MS 4,160,976 7/1979 Conroy .............. .. 343/700 MS
RR‘
FREQUENCY SCANNED A
[75] Inventors: Damel H. Schaubert; Frederick G.-
[73] Assignee:
Primary Examiner__Eli Lieberman
Farrar, both of Silver- Spring, _Md., Scott T. Hayes, Raleigh, NC, Arthur R. Sindoris, Silver Spring,
_ Attorney, Agent, or Firm-Nathan Edelberg; Robert P.
Md.
[57]
The United States of America as
An inexpensive, ?ush mounted microstrip antenna
Gb _ S l Elb m ‘ 8°“, a“ “1
ABSTRACT
_
represented by the Secretary of the
which is frequency agile and has polarization diversity.
Army, Washington, DC,
The frequency and polarization of the antenna can be selected by selecting the location of shorting posts in the antenna. The use of switching diodes in place of
[21] Appl‘ No‘: 175543 ,
[22] Filed;
4,170,012 10/1979 Kaloi .................. .. 343/700 MS 4,259,670 3/1981 Schiavone .................. .. 343/700 MS
YS
Aug 5, 1980
[51] Int. Cl.3 ............................................. .. HUIQ l/38 [52] U_.S. Cl. .................................... .. 343/700 MS [58] Field of Search ............... .. 343/700 MS, 829, 854 [56] References Cited
shorting posts provides the means of electronically switching the frequency and polarization characteristics of the antenna Frequency_ag?ity provides frequency Scannable microstrip antenna arrays which also have polarization diversity_ Frequencyag?ity, polarization
diversity and frequency scannable arrays are controlla ble by digital means such as a computer.
U.S. PATENT DOCUMENTS 3,680,136 7/1972 Collings ..................... .. 343/700 MS
10 Claims, 21 Drawing Figures
US. Patent
Jan. 4, 1983
Sheet 1 of 7
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FIG. IA PRIOR ART
FIG IB PRIOR ART
US. Patent
Jan. 4, 1983
Sheet 3 of7
4,367,474
U.S. Patent
Jan. 4, 1983
Sheet 4 of7
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0
United States Patent [191
[111
4,367,474
Schaubert et al.
[45]
Jan. 4, 1983
[54]
FREQUENCY-AGILE, POLARIZATION DIVERSE MICRQSTRIP ANTENNAS AND
4,053,895 10/1977 Malagisi ............. .. 343/700 MS 4,160,976 7/1979 Conroy .............. .. 343/700 MS
RR‘
FREQUENCY SCANNED A
[75] Inventors: Damel H. Schaubert; Frederick G.-
[73] Assignee:
Primary Examiner__Eli Lieberman
Farrar, both of Silver- Spring, _Md., Scott T. Hayes, Raleigh, NC, Arthur R. Sindoris, Silver Spring,
_ Attorney, Agent, or Firm-Nathan Edelberg; Robert P.
Md.
[57]
The United States of America as
An inexpensive, ?ush mounted microstrip antenna
Gb _ S l Elb m ‘ 8°“, a“ “1
ABSTRACT
_
represented by the Secretary of the
which is frequency agile and has polarization diversity.
Army, Washington, DC,
The frequency and polarization of the antenna can be selected by selecting the location of shorting posts in the antenna. The use of switching diodes in place of
[21] Appl‘ No‘: 175543 ,
[22] Filed;
4,170,012 10/1979 Kaloi .................. .. 343/700 MS 4,259,670 3/1981 Schiavone .................. .. 343/700 MS
YS
Aug 5, 1980
[51] Int. Cl.3 ............................................. .. HUIQ l/38 [52] U_.S. Cl. .................................... .. 343/700 MS [58] Field of Search ............... .. 343/700 MS, 829, 854 [56] References Cited
shorting posts provides the means of electronically switching the frequency and polarization characteristics of the antenna Frequency_ag?ity provides frequency Scannable microstrip antenna arrays which also have polarization diversity_ Frequencyag?ity, polarization
diversity and frequency scannable arrays are controlla ble by digital means such as a computer.
U.S. PATENT DOCUMENTS 3,680,136 7/1972 Collings ..................... .. 343/700 MS
10 Claims, 21 Drawing Figures
US. Patent
Jan. 4, 1983
Sheet 1 of 7
3.4
"
“'6
1 V
'
-
I \l2
4,367,474
.4
l2
165%
‘710
w --4
FIG. IA PRIOR ART
FIG IB PRIOR ART
US. Patent
Jan. 4, 1983
Sheet 3 of7
4,367,474
U.S. Patent
Jan. 4, 1983
Sheet 4 of7
a 4
4
\3
. J
I
0 )(2
'
/df
@
/\U6
l2 LO-
51
4,367,474
//
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23 V
(6' 4
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