Technologies Offered
Suspended Substrate Stripline
Lumped Element
Combline
Suspended Substrate Stripline
Suspended Substrate Stripline (SSS) is a printed circuit
technology that is utilised by TDL for both narrowband and wideband filters. TDL
offer designs to cover highpass, low pass, bandpass, bandstop and multiplexer applications.
SSS is also used in many of the TDL subsystem products such as switched multiplexers
, frequency activity detectors and frequency synthesisers. It is used in many EW
applications involving ESM, ECM and ELINT systems.
Benefits offered by SSS technology include:
Printed Technology
Repeatable manufacture
High Reliability
Small volume manufacture
Lumped Element
Lumped element technology is utilised by TDL where applications
require a small size, especially at lower frequencies where transmission line devices
may be too large. Both narrowband and broadband designs are available from TDL in
highpass, lowpass, bandpass, bandstop and multiplexer form.
TDL pays particular attention to the selection of high quality
components and the design of the housing so that parasitic resonance and waveguide
modes are suppressed to ensure very broad band stops and ultra small packages are
achieved.
Benefits offered by Lumped Element technology include:
Miniature size
High Reliability
Connectorised or surface Mount
Combline
TDL offer Combline filter solutions where
applications require closely spaced signals to be separated. A high Q structure
is very important for narrowband applications, particularly where high powers are
involved. Low passband loss, low VSWR and high attenuation are all characteristics
of TDL machined filters.
TDL combline filters are offered for bandwidths
of 1% to 50% of centre frequency in the frequency range of 100Mhz to 20GHz. Typical
stopbands extend to 5x fo with wider bandwidths achievable if required.
Benefits offered by Combline Filters
High Q, low loss
High power
Rugged
Filter Types
Lowpass & Highpass
Bandpass
Bandstop
Multiplexers
Channelisers
Amplitude Equalisers
Switched Filters & Switched
Multiplexers
Lowpass & Highpass Filters
TDL’s highly selective lowpass and highpass filters are designed
to have very broad passbands and stopbands with lowest possible passband insertion
loss and VSWR and high attenuation in the stopbands. TDL has numerous products available
covering the DC to 450GHz frequency range.
DC – 40GHz
Highly Selective
Low Insertion Loss
Low VSWR
Broad Stopbands
Available in Lumped Element and SSS
Miniature size
Bandpass Filters
TDL have both broadband and narrowband bandpass filters available
covering the 10MHz to 40GHz frequency range.
10MHz to 40GHz
Combline, SSS and Lumped Element
Very broad passbands
Bandstop Filters
TDL manufacture a range of fixed and tunable notch filters
in the frequency range 10MHz to 40GHz frequency range. High attenuation in the notch
is achieved with minimum impact upon the useable passband bandwidth.
10MHz – 40GHz
High Attenuation
Tuanable
Miniature Size
Multiplexers
TDL offer a range of frequency multiplexers covering the
frequency range 10MHz to 40GHz and are available in either contiguous or non contiguous
form.
10MHz – 40GHz
Diplexers and Quadraplexers
High Selectivity
Broadband and Narrowband alternatives
Phase and Amplitude Tracking
Channelisers
Channelisers
are manufactured by TDL with optimum filter characteristics for minimal distortion
of pulsed signals and have a maximally flat impulse response. The TDL channelisers
also have minimal impact on time domain performance.
Multichannel
Time domain response
Amplitude Equalisers
TDL manufactures a range of miniature SSS linear gain slope
equalisers suitable for applications as cable loss compensation in the frequency
range 500MHz to 40GHz.
500MHz – 40GHz
Linear Slope
Low Residual Loss
Superb Input and Output Match
Miniature Size
Low Power
Switched Filters and Switched Multiplexers
TDL manufactures a range of switched filterbanks
and switched multiplexers that can be tailored to customer specific requirements.
Utilising a high level of integration means that additional functions can also be
allowed within the same package if required.
Fast Switching
Low Loss/High Isolation
Miniature Size
Integrated Custom Functions
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