Microwave (SP4T & SP6T) Relay Comparison
Pickering offers two main families of Radiall SP4T & SP6T microwave relays in both PXI (models 40-785 & 40-784) &
LXI (models 60-800/803 & 60-801/802). Due to the staggered introduction time of the two relay families, there are
duplicate offerings in the 18-40GHz unterminated solutions range. The main differences between the two relay families
are summarized following:
Pros
|
Cons
|
Pros
|
Cons
|
Performance, equal or superior for most parameters |
|
|
Performance |
|
Frequency, up to 40GHz |
Frequency, up to 67GHz |
|
|
Only SP4T & 6T |
SP3T/4T/5T/6T/8T/10T & 12T |
|
|
No terminated options |
Terminated options |
|
Physically smaller, permitting three relays in two chassis slots compared to two |
|
|
Physically larger |
Note: not all frequency / channel count options are available in all combinations.
For more details regarding the various product families please refer to the product literature.
The following tables compare the performance of the 18-40GHz frequency options.
Comparison of 18GHz relays
Family
|
0-3GHz
|
3-8GHz
|
8-12.4GHz
|
12.4-18GHz
|
Conclusion
|
RAMSES |
0.2 db |
0.3 db |
0.4 db |
0.5 db |
Same performance |
Sub-miniature |
0.2 db |
0.3 db |
0.4 db |
0.5 db |
Isolation
Family
|
0-3GHz
|
3-8GHz
|
8-12.4GHz
|
12.4-18GHz
|
Conclusion
|
RAMSES |
80 db |
70 db |
60 db |
60 db |
Same performance |
Sub-miniature |
80 db |
70 db |
60 db |
60 db |
|
RF Power
Family
|
0-3GHz
|
3-8GHz
|
8-12.4GHz
|
12.4-18GHz
|
Conclusion
|
RAMSES |
240 W |
150 W |
120 W |
100 W |
Sub-miniature family has equal or superior performance |
Sub-miniature |
250 W |
150 W |
120 W |
100 W |
|
VSWR
Family
|
0-3GHz
|
3-8GHz
|
8-12.4GHz
|
12.4-18GHz
|
Conclusion
|
RAMSES |
1.20 |
1.30 |
1.40 |
1.50 |
Same performance |
Sub-miniature |
1.20 |
1.30 |
1.40 |
1.50 |
|
Family
|
Life
|
Sw. Speed
|
|
Conclusion
|
RAMSES |
2.5M |
<15mS |
Sub-miniature family has superior performance |
Sub-miniature |
10M |
<10mS |
|
Comparison of 26.5GHz relays
Family
|
0-3GHz
|
3-8GHz
|
8-12.4GHz
|
12.4-18GHz
|
18-26.5GHz
|
Conclusion
|
RAMSES |
0.2 db |
0.3 db |
0.4 db |
0.5 db |
0.7 db |
Sub-miniature family has equal or superior performance |
Sub-miniature |
0.2 db |
0.3 db |
0.4 db |
0.5 db |
0.6 db |
Isolation
Family
|
0-3GHz
|
3-8GHz
|
8-12.4GHz
|
12.4-18GHz
|
18-26.5GHz
|
Conclusion
|
RAMSES |
80 db |
70 db |
60 db |
60 db |
50 db |
Sub-miniature family has equal or superior performance |
Sub-miniature |
80 db |
70 db |
60 db |
60 db |
55 db |
|
RF Power
Family
|
0-3GHz
|
3-8GHz
|
8-12.4GHz
|
12.4-18GHz
|
12.4-18GHz
|
Conclusion
|
RAMSES |
240 W |
150 W |
120 W |
100 W |
40 W |
Sub- miniature family has equal or superior performance |
Sub-miniature |
250 W |
150 W |
120 W |
100 W |
40 W |
|
VSWR
Family
|
0-3GHz
|
3-8GHz
|
8-12.4GHz
|
12.4-18GHz
|
18-26.5GHz
|
Conclusion
|
RAMSES |
1.20 |
1.30 |
1.40 |
1.50 |
1.70 |
Sub- miniature family has equal or superior performance |
Sub-miniature |
1.20 |
1.30 |
1.40 |
1.50 |
1.60 |
|
Family
|
Life
|
Sw. Speed
|
|
Conclusion
|
RAMSES |
5M |
<15mS |
Sub- miniature family has equal or superior performance |
Sub-miniature |
10M |
<10mS |
|
Comparison of 40GHz relays
Family
|
0-3GHz
|
3-6GHz
|
6-8GHz
|
8-12.4GHz
|
12.4-18GHz
|
18-26.5GHz
|
26.5-40GHz
|
Conclusion
|
RAMSES |
0.2 db |
0.2 db |
0.4 db |
0.4 db |
0.5 db |
0.7 db |
1.1 db |
Very similar performance with each family having an equal number of superior performing points over the other |
Sub-miniature |
0.2 db |
0.3 db |
0.3 db |
0.4 db |
0.5 db |
0.7 db |
1.1 db |
Isolation
Family
|
0-3GHz
|
3-6GHz
|
6-8GHz
|
8-12.4GHz
|
12.4-18GHz
|
18-26.5GHz
|
26.5-40GHz
|
Conclusion
|
RAMSES |
70 db |
70 db |
60 db |
60 db |
60 db |
55 db |
50 db |
Similar performance with the Sub-miniature family having more superior performing points
than the RAMSES |
Sub-miniature |
80 db |
70 db |
70 db |
60 db |
60 db |
55 db |
45 db |
|
RF Power
Family
|
0-3GHz
|
3-6GHz
|
6-8GHz
|
8-12.4GHz
|
12.4-18GHz
|
18-26.5GHz
|
26.5-40GHz
|
Conclusion
|
RAMSES |
40 W |
40 W |
30 W |
30 W |
25 W |
15 W |
5 W |
Similar performance with the Sub-miniature family having more superior performing points
than the RAMSES |
Sub-miniature |
60 W |
35 W |
35 W |
30 W |
25 W |
15 W |
5 W |
|
VSWR
Family
|
0-3GHz
|
3-6GHz
|
6-8GHz
|
8-12.4GHz
|
12.4-18GHz
|
18-26.5GHz
|
26.5-40GHz
|
Conclusion
|
RAMSES |
1.30 |
1.30 |
1.40 |
1.40 |
1.50 |
1.70 |
2.20 |
Sub- miniature family has equal or superior performance |
Sub-miniature |
1.20 |
1.30 |
1.30 |
1.40 |
1.50 |
1.70 |
2.20 |
|
Family
|
Life
|
Sw. Speed
|
|
Conclusion
|
RAMSES |
2M |
<15mS |
Sub- miniature family has equal or superior performance |
Sub-miniature |
2M |
<10mS |
|