1.3cm (18-26 GHz, Primary Focus) Receiver
Navigation
Receiver Data
| Type | HEMT, cooled |
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| Channels | 2 |
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| Receiver Noise Temperature | 30 K |
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| Frequency Range | 17.9 - 26.24 GHz |
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| Bandwidth RF-Filters | see below |
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| Polarization | 2 linear (OMT) |
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| Calibration | Noise Diode |
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| Feed | Rotating Prime Focus Horn |
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| 1. IF | 2-4 GHz (Broadband) |
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| 1. Oscillator | Multiplier (16xULO1) 1.15 - 1.6 GHz |
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| 2. IF | 500 - 1000 MHz |
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| 2. Oscillator | ULO2 (x4) 937.5 MHz |
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Block Diagram
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| - to enlarge, click into block diagram - |
Comments
This is a tunable system for line observations. The total frequency range
is divided by switchable bandpass filters into 2 parts. It is necessary
to use a correct combination of RF-filter and ULO1-setting,
to avoid double sideband observing (see table below). The feed can be switched
with 1 Hz.
Charts
| RF-Range [GHz] |
RF-Band |
BP [GHz] |
S12 |
ULO1 [GHz] |
| 17.9 - 23.0 |
lower |
17.9 - 23.1 |
0 |
1.36875 - 1.5625 |
| 20.96 - 26.24 |
upper |
20.9 - 26.5 |
1 |
1.185 - 1.39 |
