Bandpass, Low Pass, Harmonic Rejection FiltersDesign
Using specialized bespoke modeling software and high speed computing power, customized product development timescales are remarkably fast. By entering specification parameters onto a computer the complete model can be produced ready for drawing within hours. The accuracy and repeatability of this process is most important and Andrew Solutions
has developed and refined this over many years.
Manufacturing
Taking the computerized model, the final hardware is manufactured
using high speed, high accuracy state of the art CNC machines. With
extremely high tolerances Andrew Solutions is able to reproduce the design
in many cases without the need for any post tuning. Eliminating
tuning saves times and leads to a more reliable product in the field.
Andrew Solutions is ideally suited to both low and high volume manufacture
of filters with fast turnaround on customer specifications whilst
producing high yield rates. Where most filters are specifically
designed around customer specifications, Andrew Solutions has the capability
to work with customers to offer a complete solution. New and innovative
ideas are constantly being developed to increase efficiency of manufacture
and to improve the lead time of design process.
Features
Particular features of the filters in the Andrew Solutions product range are
the low insertion loss (typically less than 1.2dB), stability over
a wide operating temperature range (130 deg) and the reliable long-term
performance. Particularly stringent performance requirements can
be accommodated, even at the highest operational frequencies.
Telelcommunications Filters
Andrew Solutions has been developing telecommunications filters for point
to point and point to multipoint applications since 1998 and with
over 50,000 in use around the world the company's expertise is renowned.
Filters have been designed in many shapes and materials with a primary
concern to efficiently produce and accurate and reliable filter.
The filters are machined from copper or aluminum, then soldered
or brazed together and finally plated or painted with a protective
environmental seal. Each filter contains a series of irises and
cavities in a precise configuration designed to meet the individual
specifications.
Product Range
Typical frequency coverage is from 10 to 48 GHz with particular emphasis
on the microwave link bands centered around 13, 15, 18, 23, 26,
28, 31 and 38 GHz. Development of filters outside these bands are
possible and Andrew Solutions has the capability to design and test diplexers
from 350 MHz up to 75 GHz.
Solutions
Andrew Solutions can also offer other communication components for radio links
such as flexible waveguide to link the radio to the antenna and
Hot stand by couplers to offer radio protection on key communication
links. Also rigid waveguide assemblies, horn antennas, power splitters/combiners
and diplexers. (Please refer to relevant data sheets for further
information)
| Frequency |
Bandwidth |
Insertion Loss |
Return Loss |
-20 dB
Point
BW |
Working
BW |
Spec
Losses |
Working BW
Actual Loss@ Center |
Working BW
Actual Loss@ Edges |
Spec
Loss |
Actual
Loss |
| 10 GHz (WG16)WR90 |
- |
- |
- |
- |
- |
- |
- |
| 10620 MHz |
200MHz |
160MHz |
-1.5dB |
-0.60dB |
-0.75dB |
-20dB |
-21dB |
| 11 GHz (WG17)WR75 |
- |
- |
- |
- |
- |
- |
- |
| 11700 MHz |
70 MHz |
30MHz |
-5dB |
-1.9dB |
-2.1dB |
-20dB |
-23dB |
| 11700 MHz |
2000MHz |
2000MHz |
-5dB |
-0.2dB |
-0.25dB |
-23dB |
-25dB |
| 23 GHz (WG20)WR42 |
- |
- |
- |
- |
- |
- |
- |
| 21500 MHz |
760MHz |
640MHz |
-1.2dB |
-0.65dB |
-0.9dB |
-20dB |
-23dB |
| 22750 MHz |
760MHz |
640MHz |
-1.2dB |
-0.65dB |
-0.9dB |
-20dB |
-23dB |
| 26 GHz (WG21)WR34 |
- |
- |
- |
- |
- |
- |
- |
| 25220 MHz |
660MHz |
540MHz |
-1.2dB |
-0.7dB |
-0.95dB |
-20dB |
-23dB |
| 26220 MHz |
660MHz |
540MHz |
-1.2dB |
-0.95dB |
-1.2dB |
-20dB |
-23dB |
| 38 GHz (WG22)WR28 |
- |
- |
- |
- |
- |
- |
- |
| 38500 MHz |
600MHz |
600MHz |
-1.2dB |
-1.16dB |
-1.19dB |
-16dB |
-18dB |
| 39300 MHz |
3000MHz |
2000MHz |
-0.8dB |
-0.17dB |
-0.2dB |
-18dB |
-20dB |
| 48 GHz (WG23)WR22 |
- |
- |
- |
- |
- |
- |
- |
| 48050 MHz |
360MHz |
300MHz |
-2.5dB |
-2.1dB |
-2.5dB |
-17.7dB |
-19dB |
Required Ordering Information
In order to design and manufacture customized filters we need to
know several key parameters. Please take note of the following list
so that we can produce a solution for you.
Full Electrical Specification including the following
- Frequency of Operation
- Bandwidth
- Rejection
- Harmonic Rejection (If any)
- Insertion Loss
- Return Loss
- Group Delay Flatness
- Ripple Over Passband
- Operating Temperature Range
- Mechanical Outline
- Weight
- Environmental Constraints
- Quantities and Target Price
Filters Diplexers and Combiners
