| Applications: Applications: Millimeter wave
receivers as a class are essential part of virtually every millimeter wave based
subsystem, particularly radiometers, radar and radios. However, several applications
utilize a highly sensitive receiver to achieve the ultimate primary function of the
system. Principal examples of such applications are:
|
- Electronic Warfare (EW), Electronic Support Measure (ESM)
- Direction Finding/Radar Threat Warning Systems
- Radioastronomy, Plasma Physics, Molecular Chemistry
(Spectrometers)
- Compliance measurement (Communication, Safety, Regulatory)
- Electronic Surveillance, ELINT
|
Description:
The architecture of a typical sensitive receiver subsystem
is shown in Figure 1 for reference.
Figure 1(a)
Broadband Sensitive Receiver
Figure 1(b)
Typical Broadband Sensitive Receiver Architecture
Operation and Typical Performance
Characteristics:
PLOT OF Noise Figure vs. freq. for different types of
receivers (inc. cooled). And fundamental limits.
Typical Examples and Case Histories
Table and Figure
| Frequency
Ranges |
Description and
Features |
Applications |
| From 30 to 110 GHz
(in approximately 20 GHz bands) |
Single aperture
provides extremely broadband signal to a set of receivers that cover full range in 20 GHz
bands with unique local oscillator scheme. Low noise figure with high spurious-free
dynamic range. |
Electronic
Warfare, ESM receiver, Direction Finding, Radar Threat Detection. |
1-18 GHz
MMW and Sub-MMW |
Cryogenically-cooled
receivers with cooled amplifiers |
Radio astronomy,
radiometry, Spectrometry (O3, etc.) |
55-65 GHz
|
Ultra low noise
receiver uses state of the art MMW LNA and broadband mixer |
For environmental
measurement |
| 140-152 GHz 
|
Local oscillator
at 134 GHz with 6-18 GHz IF. Noise figure of 9 dB typical (uncooled) |
Plasma measurement
system |
QuinStar Components and Products Used
|
