FEUP Technologies
For More Information Contact :
DIRECTIONAL COUPLERS
[email protected]
Bi-directional Couplers • Very Low Insertion Loss, Microstrip Design • High Isolation • Good Coupling Flatness • Low VSWR • SMA Gold Plated connectors
DESCRIPTION This microstrip component is designed for system applications where simultaneous forward and reflected power measurement is required. They are ideal for use in telecommunications equipment that function around microwave frequencies, the L and S bands in particular (around 2 GHz). The design has involved a compromise between electrical performance and physical size for tightly packaged applications.
APPLICATIONS •
Determining VSWR and Scattering parameters
•
Measurement of reflected and forward power
•
Signal sampling
SPECIFICATIONS Frequency Range
1255- 2267
Maximum Coupling Frequency
1827
Main Line Return Loss
MH z MH z
> 28
dB
Secondary Line Return Loss
> 27
dB
Main Line Insertion Loss
<0,6
dB
Forward Coupling
11,16 ± 0.05
dB
Reverse Coupling
11,14+0.05
dB
Forward Directivity Reverse Directivity Forward Coupling Isolation Reverse Coupling Isolation
Low 18,27 Mid 12,65 High 9,27 Low 18,11 Mid 13,24 High 9,98 Low 29,74 Mid 23,88 High 21,58 Low 29,92 Mid 23.31 High 20,92
All parameters are within the specified frequency range. Low, Mid and High in directivity and isolation parameters refer to start of band, maximum coupling frequency and end of band
dB
dB
dB
dB
FEUP Technologies
For More Information Contact :
DIRECTIONAL COUPLERS
[email protected]
OUTLINE DRAWINGS
CHARACTERISTIC PLOTS Main Line Return Loss
Seconday Line Return Loss
25
25
30.5
30
36
35
41.5
Magnitude (dB)
52.5 58
45
50
55 63.5 69
60
Forward port Reverse port
Forward port Reverse port 65
74.5 80 0.85
1.05
1.25
1.45
1.65 1.85 2.05 Frequency (GHz)
2.25
2.45
2.65
2.85
70 0.85
1.05
1.25
1.45
1.65 1.85 2.05 Frequency (GHz)
Main Line Insertion Loss 0.25
0.3
Forward path Reverse path
0.35
0.4
Magnitude (dB)
Magnitude (dB)
40 47
0.45 0.5
0.55 0.6
0.65 0.7
0.75 0.85
1.05
1.25
1.45
1.65 1.85 2.05 Frequency (GHz)
2.25
2.45
2.65
2.85
2.25
2.45
2.65
2.85
FEUP Technologies
For More Information Contact :
DIRECTIONAL COUPLERS
[email protected]
CHARACTERISTIC PLOTS Coupling Insertion Loss
Coupling Isolation
10
19
10.5
21
11 23
11.5
25 Magnitude (dB)
13 13.5 14
29
33
Forward port Reverse port
15
Forward port Reverse port 35
15.5 16 0.85
27
31
14.5
1.05
1.25
1.45
1.65 1.85 2.05 Frequency (GHz)
2.25
2.45
2.65
37 0.85
2.85
1.05
1.25
1.45
1.65 1.85 2.05 Frequency (GHz)
Directivity 3 5 7 9 11 Magnitude (dB)
Magnitude (dB)
12 12.5
13 15 17 19 Forward coupling Reverse coupling
21 23 25 0.85
1.05
1.25
1.45
1.65 1.85 2.05 Frequency (GHz)
2.25
2.45
2.65
2.85
NOTES All published specifications apply by using a matched designed test fixture with testing at ambient room temperature. Test include VSWR, Insertion Directivity, Insertion Loss and Coupling. All measurements are done in a 50-ohm impedance test system. All dimensions are milimeters.
2.25
2.45
2.65
2.85
