EA3HMJ 24 GHz Dual Mode feed - WordPress.com · 24 GHz Dual Mode Feed With WR-42 (WG-20, R220) WG-interface and coaxial interface (RA3WDK) With small wave guide only EA3HMJ proposal

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


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


3D Model




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

Tsky = 10KTGnd = 290K

Trcvr = 0KSolid Dish



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




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





-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



Name X Y

m1 0.0000 13.0897

m2 -40.0000 3.1651

m3 40.0000 3.3335

m4 -180.0000 -6.7336


d( m1,m4) -180.0000 -19.8233 0.1101 9.0802


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



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


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


3D Model


3D Model




InDish PerformanceEA3HMJ 24 GHz fittings feed


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


Fee

d P

has

e A

ng

le

E-plane

H-plane


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




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





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




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



m1 24.0000 162.1101 0.0170 0.9680 + 0.0101i





-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



Name X Y

m1 0.0000 13.3164

m2 -40.0000 3.5356

m3 40.0000 3.4574

m4 -180.0000 -11.8782


d(m1,m4) -180.0000 -25.1946 0.1400 7.1444


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



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


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


3D Model


3D Model


3D Model


InDish PerformanceRA3WDK 24 GHz feed


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


Fee

d P

has

e A

ng

le

E-plane

H-plane


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




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





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




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



m1 24.0000 -25.8878 0.0551 1.1029 - 0.0532i





-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




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



Documents

EA3HMJ 24 GHz Dual Mode feed - WordPress.com · 24 GHz Dual Mode Feed With WR-42 (WG-20, R220) WG-interface and coaxial interface (RA3WDK) With small wave guide only EA3HMJ proposal