+49 8193 - 93 92 90
+49 8193 - 93 92 90
As the diplexer/multiplexer is a complex passive design item, it is strongly recommended that you utilize MIWEKO's (and its partners) expertise. You may find that the right solution already exists or you could initiate a bespoke item.
Switching/guidance between different ports at the same wavelength.
NOTE: The term 'duplexer' is frequently used to mean different things. Sometimes it can be unclear what the difference between a diplexer and a duplexer is, or both terms may be used
as synonyms. The nomenclature applied here is that the duplexer switches / guides energy at the same frequency/wavelength of the radiation, while the diplexer switches / guides energy at different frequencies.
In addition to many other potential applications, the typical duplex operation in RF systems is the guidance of relatively high-power transmitter energy to an antenna (whilst protecting/isolating the corresponding receiver system) and the guidance of
relatively low power reception energy to the receiver system with a time-delayed signal echo (while isolating the transmitter system) (semi-duplex operation).
The major issue is the guidance/isolation aspect. Depending on the operating conditions,
this can be realized by either passive and time-delayed switching devices (branch duplexer, balanced duplexer or pin-diode duplexer (see also:"http://www.radartutorial.de/06.antennas/Sende-%20Empfangsweiche.de.html"
or "http://de.wikipedia.org/wiki/Duplexer") or passive directional (but non-switching) components (suitable for full duplex operation). These can be realized under limited conditions using e.g., circulators
(or cascades of these), hybrid rings/rat-race couplers or orthomode transducers (also called polarization duplexers).
The first examples are complex and require dedicated engineering activities. They have to be closely attuned to the design system
and are therefore not supplied by MIWEKO. For exceptional cases or components, please give us a call and we will do our best to support you.
However, passive directional components which enable simultaneous operation of transmitter and receiver
signals are supplied by MIWEKO. Please refer to the respective components.
The OMT, also called a 'polarization duplexer', is used wherever two signals are to be distinguished by their polarization (orthogonal). This might apply if e.g. a high power transmission is to be separated from a low power reception path or the information
bandwidth of a system is to be enlarged, while keeping the number of frequency-dependent components to a minimum.
As the design also depends critically on the desired system performance, we recommend you submit an RFI to MIWEKO here.
For more
information visit the following links:
http://www.mm-microwave.com/product/omts/
http://de.wikipedia.org/wiki/Orthomode_Transducer
Circulators can be operated as duplexers or isolators.
For example, a three port circulator enables transmission from port 1 (typically the transmitter line) to port 2 (typically the antenna line) in one direction (while port 3 is closed) and transmission
from port 2 to port 3 (typically the receiver or protection line) in the other direction (while port 2 is closed).
Simply by connecting port 3 to the receiver system the circulator is operated as a duplexer, while terminating port 3 with an impedance
matched load turns the circulator into an isolator. Please note that operation as a duplexer is limited by the power rating, as specified by the limits for isolation between port 1 and port 3.
For detailed information submit your RFI here.
http://en.wikipedia.org/wiki/Circulator
http://www.radartutorial.de/17.bauteile/bt33.en.html
Terminations are the main component you need to protect your system. Depending on the frequency range and power rating, a wide variety of terminations/loads are available on the market. However, when it comes to waveguides, typically there are only ever
a few occasions where a standard component will fit your design. To find the most appropriate one for your purpose, just ask MIWEKO.
Depending on the applicable power rating and environmental conditions, it is also worth considering the cooling
conditions at an early stage in the development of your desired system (putting energy into a system is one thing, to get rid of it is another).
... available coolant variants
Waveguide attenuators are available in all waveguide sizes and power ratings up to 200 W (CW) and 900 kW (peak). MIWEKO supplies waveguide fixed attenuators. These reduce the radiated power by the insertion loss up to the maximum operational power rating. You may select any flange type according to your installation environment. If you prefer standard components, simply define the physical requirements and we will see what can be provided cost-effectively for you.
The filter characteristics can be selected for e.g. Chebychev, Bessel, etc.
The directional coupler architecture is almost the same as that of a power divider/splitter. The major difference between the two component types is the directional coupler's optimization with respect to couple accuracy and directivity. Its objective
is to provide a coupled port for a probe to monitor the forward/backward signal. The coupling factor between input and coupling port can be selected from 3dB up to 70 dB.
There are almost no restrictions when it comes to selecting the most appropriate
connection configuration. E.g. any flange configuration can be selected for the main transmission ports, while the coupling port could be any coax type connection. Couplers are available as 3 or 4 port devices, while port "4" on the 3 port variant is
internally terminated with a load.
For more detailed information on coupler technology, please refer to:
http://en.wikipedia.org/wiki/Power_dividers_and_directional_couplers
... available Components
MIWEKO (and partners) can supply any type of rotary joint, regardless of whether you are looking for components for single-channel miniaturized or large-scale multi-channel air traffic control radar systems. Every device is optimized for a long service
life.
On complex rotary joints, a combination using an auxiliary channel for e.g. control data communication or cooling capabilities is possible.
It is not very likely we will find an existing standard component that may fit directly into your
application or which can be customized. The most cost-effective way would be to check for available standard components/systems to which your design might be adapted.
You may purchase fully assembled and calibrated systems or components of these.As large and expensive rotary joints naturally entail long service lives, MIWEKO can offer periodic or on-demand maintenance workshops to support your servicing and maintenance activities.
Small and medium-sized horn and slotted array antennae can be provided by MIWEKO.
Horn antennae are typically off-the-shelf components (flange type may be customer-specific), but slotted arrays are typically customized design items. Neither category
will pose a problem for you.
http://www.radartutorial.de/06.antennas/Schlitzantenne.de.html
http://www.radartutorial.de/03.linetheory/tl50.de.html
http://en.wikipedia.org/wiki/Slot_antenna
http://en.wikipedia.org/wiki/Horn_antenna
... available Productparameter
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