Antenna and Microwave Component Design with HFSS
ANSOFT’S HFSS USERS PRESENTATIONS
19th FEBRUARY, 2004
Los Angeles, CA; Crowne Plaza Hotel, LA International Airport
TITLE
ANTENNA AND MICROWAVE COMPONENTS DESIGN
WITH ANSOFT’S HIGH FREQUENCY SIMULATOR
VERSION 9.1
PRESENTED
BY
AMEDEO LARUSSI
1
Space and Airborne Systems
Electronic Warfare Systems
6380 Hollister Avenue
Goleta, CA 93117-3114
2
EXAMPLE OF RAYTHEON EW PRODUCTS
3
ACKNOWLEDGEMENTS:
•
Special thanks to Tom Debski from Raytheon Corporation,
Goleta for providing material presented herein.
• Also, thanks to Dr Martin Vogel from Ansoft Corporation for providing the thermal analysis for one of the problems listed in this presentation
4
DESIGN OF A COAXIAL TRANSFORMER WITH HFSS WITH EXCEL HELP
REQUIREMENTS: 3:1 VSWR MATCH; D TO REMAIN CONSTANT
5
6
THEORETICAL RESULTS PREDICTION WITH FORMULAS
DEVELOPED WITH EXCEL
Input VSWR
4.0
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
0
2
4
FREQUENCY (GHz)
6
8
10
7
MEASURED DATA Vs. THEORETICAL DATA (HFSS) OF A COAXIAL 3:1 MATCH LOAD
Measured
HFSS
DESIGN GOAL
6.0
V S W R (R A T IO )
5.0
4.0
aa
3.0
2.0
1.0
0.0
2.00
3.00
4.00
FREQUENCY (GHz)
5.00
6.00
8
DESIGN OF WRD 650 IMPEDANCE TRANSFORMER WITH HFSS AND
EXCEL HELP (REQUIREMENTS 3:1 VSWR MATCH)
9
DESIGN WITH EXCEL WRD 650
10
11
220 Ώ/73.3 Ώ =3:1 (VSWR)
GAP=0.0336”
GAP=.101”
12
MEASURED DATA Vs. THEORETICAL DATA (HFSS) OF A 3:1 MATCH WR 650
MEASURED DATA (8/5/03)
HFSS
DESIGN GOAL
4
V S W R (R A T IO )
3.5
3
2.5
2
1.5
1
6.5
7.5
8.5
9.5
FREQUENCY (GHz)
10.5
11.5
13
EXAMPLE OF A DUAL RIDGE WAVEGUIDE GAP ANALYSIS
GAP SENSITIVITY ANALYSIS
BASELINE GAP=0.029"
GAP=0.030"
GAP=0.031"
GAP=0.033"
GAP=0.035"
2
1.9
1.8
VSWR
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1
6
7
8
9
10
11
12
13
14
FREQUENCY (GHz)
14
SWEEPING WITH HFSS VERSION 9.1 Vs 8.
IN VERSION 8 THE GEOMETRY SHOWN COULD ONLY SWEEP
4 SEGMENTS OVER A COMPLICATED PATH.
VERSION 9.1
CABLE EXAMPLE
15
A TYPICAL TAPERED NOTCH ANTENNA MODEL WITH HFSS VER. 9.1
METAL
19th FEBRUARY, 2004
Los Angeles, CA; Crowne Plaza Hotel, LA International Airport
TITLE
ANTENNA AND MICROWAVE COMPONENTS DESIGN
WITH ANSOFT’S HIGH FREQUENCY SIMULATOR
VERSION 9.1
PRESENTED
BY
AMEDEO LARUSSI
1
Space and Airborne Systems
Electronic Warfare Systems
6380 Hollister Avenue
Goleta, CA 93117-3114
2
EXAMPLE OF RAYTHEON EW PRODUCTS
3
ACKNOWLEDGEMENTS:
•
Special thanks to Tom Debski from Raytheon Corporation,
Goleta for providing material presented herein.
• Also, thanks to Dr Martin Vogel from Ansoft Corporation for providing the thermal analysis for one of the problems listed in this presentation
4
DESIGN OF A COAXIAL TRANSFORMER WITH HFSS WITH EXCEL HELP
REQUIREMENTS: 3:1 VSWR MATCH; D TO REMAIN CONSTANT
5
6
THEORETICAL RESULTS PREDICTION WITH FORMULAS
DEVELOPED WITH EXCEL
Input VSWR
4.0
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
0
2
4
FREQUENCY (GHz)
6
8
10
7
MEASURED DATA Vs. THEORETICAL DATA (HFSS) OF A COAXIAL 3:1 MATCH LOAD
Measured
HFSS
DESIGN GOAL
6.0
V S W R (R A T IO )
5.0
4.0
aa
3.0
2.0
1.0
0.0
2.00
3.00
4.00
FREQUENCY (GHz)
5.00
6.00
8
DESIGN OF WRD 650 IMPEDANCE TRANSFORMER WITH HFSS AND
EXCEL HELP (REQUIREMENTS 3:1 VSWR MATCH)
9
DESIGN WITH EXCEL WRD 650
10
11
220 Ώ/73.3 Ώ =3:1 (VSWR)
GAP=0.0336”
GAP=.101”
12
MEASURED DATA Vs. THEORETICAL DATA (HFSS) OF A 3:1 MATCH WR 650
MEASURED DATA (8/5/03)
HFSS
DESIGN GOAL
4
V S W R (R A T IO )
3.5
3
2.5
2
1.5
1
6.5
7.5
8.5
9.5
FREQUENCY (GHz)
10.5
11.5
13
EXAMPLE OF A DUAL RIDGE WAVEGUIDE GAP ANALYSIS
GAP SENSITIVITY ANALYSIS
BASELINE GAP=0.029"
GAP=0.030"
GAP=0.031"
GAP=0.033"
GAP=0.035"
2
1.9
1.8
VSWR
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1
6
7
8
9
10
11
12
13
14
FREQUENCY (GHz)
14
SWEEPING WITH HFSS VERSION 9.1 Vs 8.
IN VERSION 8 THE GEOMETRY SHOWN COULD ONLY SWEEP
4 SEGMENTS OVER A COMPLICATED PATH.
VERSION 9.1
CABLE EXAMPLE
15
A TYPICAL TAPERED NOTCH ANTENNA MODEL WITH HFSS VER. 9.1
METAL