ea3hmj 24 ghz dual mode feed - wordpress.com · 24 ghz dual mode feed with wr-42 (wg-20, r220)...
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Analysis of EA3HMJ and RA3WDK24 GHz Dual Mode Feed
With WR-42 (WG-20, R220) WG-interface and coaxial interface (RA3WDK)
With small wave guide onlyEA3HMJ proposal
3/8” tube
SM6FHZ 2015 Rev B 3
3D Model
SM6FHZ 2015 Rev B 4
3D Model with tuning screw
SM6FHZ 2015 Rev B 5
S11 in rectangular port
22.00 22.50 23.00 23.50 24.00 24.50 25.00 25.50 26.00Freq [GHz]
-17.50
-15.00
-12.50
-10.00
-7.50
-5.00
-2.50
0.00
dB
(S(1
,1))
SM6FHZ EA3HMJ_24GHz_Dual_Mode_feedS11Curve Info
dB(S(1,1))Setup1 : Sw eep
SM6FHZ 2015 Rev B 6
S11 in rectangular port
5.002.001.000.500.200.00
5.00
-5.00
2.00
-2.00
1.00
-1.00
0.50
-0.50
0.20
-0.20
0.00 0
10
20
30
40
50
60
70
8090
100
110
120
130
140
150
160
170
180
-170
-160
-150
-140
-130
-120
-110
-100 -90 -80
-70
-60
-50
-40
-30
-20
-10
EA3HMJ_24GHz_Dual_Mode_feedSmith Chart 1
m1
Curve Info
S(1,1)Setup1 : Sw eep
Name Freq Ang Mag RX
m1 24.0000 -132.4784 0.2953 0.6142 - 0.2931i
SM6FHZ 2015 Rev B 7
3D Far Field Total Power Directivity
SM6FHZ 2015 Rev B 8
Co and Cross FF pattern Phi = 0deg
-200.00 -150.00 -100.00 -50.00 0.00 50.00 100.00 150.00 200.00Theta [deg]
-60.00
-50.00
-40.00
-30.00
-20.00
-10.00
0.00
10.00
Y1
SM6FHZ EA3HMJ_24GHz_Dual_Mode_feedCo and cross FF pattern Phi 0 degCurve Info
dB(DirPhi)Setup1 : LastAdaptiveFreq='24GHz' Phi='0deg'
dB(DirTheta)Setup1 : LastAdaptiveFreq='24GHz' Phi='0deg'
SM6FHZ 2015 Rev B 9
FF Phase Error
-100.00 -75.00 -50.00 -25.00 0.00 25.00 50.00 75.00 100.00Theta [deg]
-100.00
-90.00
-80.00
-70.00
-60.00
-50.00
-40.00
-30.00
-20.00
-10.00
0.00
Y1
[de
g]
SM6FHZ WG_interface8FF Phase error
m1
m2
m3
m4m5
Curve Info
ang_deg(rEPhi)Setup1 : LastAdaptiveFreq='24GHz' Phi='0deg'
ang_deg(rETheta)Setup1 : LastAdaptiveFreq='24GHz' Phi='90deg'
Name X Y
m1 0.0000 -48.0419
m2 -60.0000 -38.0679
m3 60.0000 -36.3095
m4 -60.0000 -46.0822
m5 60.0000 -44.8207
Name Delta(X) Delta(Y) Slope(Y) InvSlope(Y)
d( m2,m4) 0.0000 -8.0143 N/A -0.0000
d( m3,m5) 0.0000 -8.5112 N/A -0.0000
Full feedEA3HMJ proposal
Small circular WG 3/8” tube
SM6FHZ 2015 Rev B 11
3D Model
SM6FHZ 2015 Rev B 12
3D Model
SM6FHZ 2015 Rev B 13
3D Model with tuning screw
SM6FHZ 2015 Rev B 14
InDish PerformanceEA3HMJ 24 GHz 3/8" circ WG Feed
Dish diameter = 144 λ Feed diameter = 3 λ
Linear
Total
0 dB -10 -20 -30
Fee
d R
adia
tio
n P
atte
rn
W1GHZ 1998, 2014
45˚-planes
0 10 20 30 40 50 60 70 80 90-90
-67.5
-45
-22.5
0
22.5
45
67.5
90
Rotation Angle around
Fee
d P
has
e A
ng
le
E-plane
H-plane
specifiedPhase Center = 0.04 λ inside aperture
0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.00.25
10
20
30
40
50
60
70
80
90MAX Possible Efficiency with Phase error
MAX Possible Efficiency with XPOL loss & Phase error
REAL WORLD at least 15% lowerMAX Efficiency without phase error Illumination
Spillover
AFTER LOSSES:
Feed Blockage
Parabolic Dish f/D
Par
abo
lic D
ish
Eff
icie
ncy
%
39 dB
38 dB
37 dB
36 dB
35 dB
34 dB
33 dB
32 dB
31 dB
G/T at 45˚ Elevation
G/T at 20˚ Elevation
G/T at 70˚ Elevation
G/T
Tsky = 10KTGnd = 290K
Trcvr = 0KSolid Dish
SM6FHZ 2015 Rev B 15
S11 in rectangular port
22.00 22.50 23.00 23.50 24.00 24.50 25.00 25.50 26.00Freq [GHz]
-30.00
-25.00
-20.00
-15.00
-10.00
-5.00
0.00
dB(S
(1,1
))
SM6FHZ EA3HMJ_24GHz_Dual_Mode_feed1S11Curve Info
dB(S(1,1))Setup1 : Sw eep
SM6FHZ 2015 Rev B 16
S11 in rectangular port
5.002.001.000.500.200.00
5.00
-5.00
2.00
-2.00
1.00
-1.00
0.50
-0.50
0.20
-0.20
0.00 0
10
20
30
40
50
60
70
8090
100
110
120
130
140
150
160
170
180
-170
-160
-150
-140
-130
-120
-110
-100-90
-80
-70
-60
-50
-40
-30
-20
-10
SM6FHZ EA3HMJ_24GHz_Dual_Mode_feed1Smith Chart 1
m1
Curve Info
S(1,1)Setup1 : Sw eepName Freq Ang Mag RX
m1 24.0000 136.3615 0.1958 0.7276 + 0.2045i
SM6FHZ 2015 Rev B 17
3D Far Field Total Power Directivity
SM6FHZ 2015 Rev B 18
Co and Cross FF pattern Phi = 0deg
-200.00 -150.00 -100.00 -50.00 0.00 50.00 100.00 150.00 200.00Theta [deg]
-60.00
-50.00
-40.00
-30.00
-20.00
-10.00
0.00
10.00
20.00
Y1
SM6FHZ EA3HMJ_24GHz_Dual_Mode_feed1Co and cross FF pattern Phi 0 deg
m1
m2 m3
m4
Curve Info
dB(DirPhi)Setup1 : LastAdaptiveFreq='24GHz' Phi='0deg'
dB(DirTheta)Setup1 : LastAdaptiveFreq='24GHz' Phi='0deg'
Name X Y
m1 0.0000 13.0897
m2 -40.0000 3.1651
m3 40.0000 3.3335
m4 -180.0000 -6.7336
Name Delta(X) Delta(Y) Slope(Y) InvSlope(Y)
d( m1,m4) -180.0000 -19.8233 0.1101 9.0802
SM6FHZ 2015 Rev B 19
FF Phase Error
-100.00 -75.00 -50.00 -25.00 0.00 25.00 50.00 75.00 100.00Theta [deg]
-100.00
-75.00
-50.00
-25.00
0.00
25.00
50.00
75.00
100.00
Y1
[de
g]
SM6FHZ EA3HMJ_24GHz_Dual_Mode_feed1FF Phase error
m1
m2 m3
m4m5
m6
m7
m8
m9
Curve Info
ang_deg(rEPhi)Setup1 : LastAdaptiveFreq='24GHz' Phi='0deg'
ang_deg(rETheta)Setup1 : LastAdaptiveFreq='24GHz' Phi='90deg'
Name X Y
m1 0.0000 9.8520
m2 -20.0000 13.7454
m3 20.0000 14.0297
m4 20.0000 6.8971
m5 -20.0000 7.1245
m6 -40.0000 26.3043
m7 -40.0000 -1.3700
m8 40.0000 26.8161
m9 40.0000 -2.8618
Name Delta(X) Delta(Y) Slope(Y) InvSlope(Y)
d(m6,m7) 0.0000 -27.6743 N/A -0.0000
d(m8,m9) 0.0000 -29.6779 N/A -0.0000
Full feed EA3HMJ modified proposal including guidance from SM6FHZ
Circular input WG 10 mm inner diameter
SM6FHZ 2015 Rev B 21
3D Model
SM6FHZ 2015 Rev B 22
3D Model
SM6FHZ 2015 Rev B 23
3D Model with tuning screw
SM6FHZ 2015 Rev B 24
InDish PerformanceEA3HMJ 24 GHz fittings feed
Dish diameter = 144 λ Feed diameter = 3 λ
Linear
Total
0 dB -10 -20 -30
Fee
d R
adia
tio
n P
atte
rn
W1GHZ 1998, 2014
45˚-planes
0 10 20 30 40 50 60 70 80 90-90
-67.5
-45
-22.5
0
22.5
45
67.5
90
Rotation Angle around
Fee
d P
has
e A
ng
le
E-plane
H-plane
specifiedPhase Center = 0.15 λ inside aperture
0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.00.25
10
20
30
40
50
60
70
80
90MAX Possible Efficiency with Phase error
MAX Possible Efficiency with XPOL loss & Phase error
REAL WORLD at least 15% lowerMAX Efficiency without phase error Illumination
Spillover
AFTER LOSSES:
Feed Blockage
Parabolic Dish f/D
Par
abo
lic D
ish
Eff
icie
ncy
%
39 dB
38 dB
37 dB
36 dB
35 dB
34 dB
33 dB
32 dB
31 dB
G/T at 45˚ Elevation
G/T at 20˚ Elevation
G/T at 70˚ Elevation
G/T
Tsky = 10KTGnd = 290K
Trcvr = 0KSolid Dish
SM6FHZ 2015 Rev B 25
S11 in rectangular port
22.00 22.50 23.00 23.50 24.00 24.50 25.00 25.50 26.00Freq [GHz]
-45.00
-40.00
-35.00
-30.00
-25.00
-20.00
-15.00
-10.00
dB
(S(1
,1))
SM6FHZ EA3HMJ_24GHz_Dual_Mode_feed_Cu_fittingS11Curve Info
dB(S(1,1))Setup1 : Sw eep
SM6FHZ 2015 Rev B 26
S11 in rectangular port
5.002.001.000.500.200.00
5.00
-5.00
2.00
-2.00
1.00
-1.00
0.50
-0.50
0.20
-0.20
0.00 0
10
20
30
40
50
60
70
8090
100
110
120
130
140
150
160
170
180
-170
-160
-150
-140
-130
-120
-110
-100-90
-80
-70
-60
-50
-40
-30
-20
-10
SM6FHZ EA3HMJ_24GHz_Dual_Mode_feed_Cu_fittingSmith Chart 1
m1
Curve Info
S(1,1)Setup1 : Sw eep
Name Freq Ang Mag RX
m1 24.0000 162.1101 0.0170 0.9680 + 0.0101i
SM6FHZ 2015 Rev B 27
3D Far Field Total Power Directivity
SM6FHZ 2015 Rev B 28
Co and Cross FF pattern Phi = 0deg
-200.00 -150.00 -100.00 -50.00 0.00 50.00 100.00 150.00 200.00Theta [deg]
-60.00
-50.00
-40.00
-30.00
-20.00
-10.00
0.00
10.00
20.00
Y1
SM6FHZ EA3HMJ_24GHz_Dual_Mode_feed_Cu_fittingCo and cross FF pattern Phi 0 deg
m1
m2 m3
m4
Curve Info
dB(DirPhi)Setup1 : LastAdaptiveFreq='24GHz' Phi='0deg'
dB(DirTheta)Setup1 : LastAdaptiveFreq='24GHz' Phi='0deg'
Name X Y
m1 0.0000 13.3164
m2 -40.0000 3.5356
m3 40.0000 3.4574
m4 -180.0000 -11.8782
Name Delta(X) Delta(Y) Slope(Y) InvSlope(Y)
d(m1,m4) -180.0000 -25.1946 0.1400 7.1444
SM6FHZ 2015 Rev B 29
FF Phase Error
-100.00 -75.00 -50.00 -25.00 -0.00 25.00 50.00 75.00 100.00Theta [deg]
-100.00
-75.00
-50.00
-25.00
-0.00
25.00
50.00
75.00
100.00
Y1
[deg
]
SM6FHZ EA3HMJ_24GHz_Dual_Mode_feed_Cu_fittingFF Phase error
m1
m2 m3
m4m5
m6
m7
m8
m9
Curve Info
ang_deg(rEPhi)Setup1 : LastAdaptiveFreq='24GHz' Phi='0deg'
ang_deg(rETheta)Setup1 : LastAdaptiveFreq='24GHz' Phi='90deg'
Name X Y
m1 0.0000 -31.6287
m2 -20.0000 -27.7220
m3 20.0000 -27.1667
m4 20.0000 -33.7042
m5 -20.0000 -33.1995
m6 -40.0000 -11.2205
m7 -40.0000 -36.9114
m8 40.0000 -10.4437
m9 40.0000 -38.7520
Name Delta(X) Delta(Y) Slope(Y) InvSlope(Y)
d(m6,m7) 0.0000 -25.6910 N/A -0.0000
d(m8,m9) 0.0000 -28.3083 N/A -0.0000
RA3WDK 24 GHz feed
Coaxial input
SM6FHZ 2015 Rev B 31
3D Model
SM6FHZ 2015 Rev B 32
3D Model
SM6FHZ 2015 Rev B 33
3D Model
SM6FHZ 2015 Rev B 34
InDish PerformanceRA3WDK 24 GHz feed
Dish diameter = 144 λ Feed diameter = 3 λ
Linear
Total
0 dB -10 -20 -30
Fee
d R
adia
tio
n P
atte
rn
W1GHZ 1998, 2014
45˚-planes
0 10 20 30 40 50 60 70 80 90-90
-67.5
-45
-22.5
0
22.5
45
67.5
90
Rotation Angle around
Fee
d P
has
e A
ng
le
E-plane
H-plane
specifiedPhase Center = 0.54 λ inside aperture
0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.00.25
10
20
30
40
50
60
70
80
90MAX Possible Efficiency with Phase error
MAX Possible Efficiency with XPOL loss & Phase error
REAL WORLD at least 15% lowerMAX Efficiency without phase error Illumination
Spillover
AFTER LOSSES:
Feed Blockage
Parabolic Dish f/D
Par
abo
lic D
ish
Eff
icie
ncy
%
37 dB
36 dB
35 dB
34 dB
33 dB
32 dB
31 dB
30 dB
29 dB
G/T at 45˚ Elevation
G/T at 20˚ Elevation
G/T at 70˚ Elevation
G/T
Tsky = 10KTGnd = 290K
Trcvr = 0KSolid Dish
SM6FHZ 2015 Rev B 35
S11 in rectangular port
23.00 23.25 23.50 23.75 24.00 24.25 24.50 24.75 25.00Freq [GHz]
-26.00
-24.00
-22.00
-20.00
-18.00
-16.00
-14.00
-12.00
dB(S
(1,1
))
SM6FHZ RA3WDK_dual_mode_feedS11Curve Info
dB(S(1,1))Setup1 : Sw eep
SM6FHZ 2015 Rev B 36
S11 in rectangular port
5.002.001.000.500.200.00
5.00
-5.00
2.00
-2.00
1.00
-1.00
0.50
-0.50
0.20
-0.20
0.00 0
10
20
30
40
50
60
70
8090
100
110
120
130
140
150
160
170
180
-170
-160
-150
-140
-130
-120
-110
-100 -90 -80
-70
-60
-50
-40
-30
-20
-10
RA3WDK_dual_mode_feedSmith Chart 1
m1
Curve Info
S(1,1)Setup1 : Sw eep
Name Freq Ang Mag RX
m1 24.0000 -25.8878 0.0551 1.1029 - 0.0532i
SM6FHZ 2015 Rev B 37
3D Far Field Total Power Directivity
SM6FHZ 2015 Rev B 38
Co and Cross FF pattern Phi = 0deg
-200.00 -150.00 -100.00 -50.00 0.00 50.00 100.00 150.00 200.00Theta [deg]
-50.00
-40.00
-30.00
-20.00
-10.00
-0.00
10.00
20.00
Y1
SM6FHZ RA3WDK_dual_mode_feedCo and cross FF patternsCurve Info
dB(DirPhi)Setup1 : LastAdaptiveFreq='24GHz' Phi='0deg'
dB(DirTheta)Setup1 : LastAdaptiveFreq='24GHz' Phi='0deg'
SM6FHZ 2015 Rev B 39
FF Phase Error
-100.00 -75.00 -50.00 -25.00 -0.00 25.00 50.00 75.00 100.00Theta [deg]
-200.00
-150.00
-100.00
-50.00
0.00
50.00
100.00
150.00
200.00
Y1
[deg
]
SM6FHZ RA3WDK_dual_mode_feedFF Phase ErrorCurve Info
ang_deg(rEPhi)Setup1 : LastAdaptiveFreq='24GHz' Phi='0deg'
ang_deg(rETheta)Setup1 : LastAdaptiveFreq='24GHz' Phi='90deg'