Since 1980, OPT HELLAS has specialised in developing customised frequency control products for various markets, including military, avionics, commercial, wireless, and instrumentation. Located just outside of metropolitan Athens, Greece, OPT HELLAS's main facility has been ISO 9001 certified since 1998 for the design and manufacturing of telecom filters.

APC are able to offer a complete line of OPT HELLAS SA custom-designed frequency control products, which combine quality with cost and delivery benefits.

Our Quality Assurance Procedures are in compliance with IS0-9001 /2008, MIL-STD-202 and MIL-1-45208.

OPT HELLAS custom design ranges include:

Crystal Filters

Whether your application requires monolithic, discrete, SSB technology filters or standard frequency filters with improved characteristics (group delay, IM, ripple), OPT stands ready as an experienced supplier to service your requirements. Over the 22 years history, OPT HELLAS has developed more than 2000 crystal filters from 1.4 MHz to 200 MHz in Butterworth, Chebyshev, Linear Phase and Gaussian design types. The reference filter library allows OPT filter engineers to realise a successful and timely development for a new crystal filter requirement.

Monolithic Designs

Frequency Range: 4 to 150 MHz

Relative Bandwidth: 0.01 % to 0.1 %

Shape Factor: 2:1 and higher

Number of poles: 2 to 12

Discrete Designs

Frequency Range: 1.4 to 200 MHz

Relative Bandwidth: 0.01 % to 0.2 %

Shape Factor: 1.5:1 and higher

Number of poles: 2 to 12

Package Configuration: Through Hole, Connectorized and SMD

Operating Temperatures: 20 °C to + 70 °C, - 40 °C to + 85 °C, - 50 °C to + 90 °C

New filters are designed by engineers and manufactured regularly. Therefore, if the desired frequency and specifications are not listed below, please contact us.

LC Filters

OPT HELLAS utilizes modern dynamic CAD and CAE software to successfully design LC filters in the frequency range of 1 KHz to 3 GHz. Using these design tools, we can generate transfer functions specific to particular applications. OPT Hellas offers all standard design types, that is: Chebychev, Butterworth, Eliptic, Causian and Bessel functions.

Frequency Range: 1 Khz to 3 OOO MHz

Relative Bandwidths: 2 % to 100 %

Power: 200 to 500 Watts. Others per request.

Package Configuration: Through Hole, Connectorized and SMD

Use of standard packages has enabled OPT HELLAS to provide Custom units while keeping delivery time to a minimum.

Cavity Filters

OPT HELLAS offers a full line of cavity-type filters in band-pass and notch type filters. A notch-type filter attenuates a narrow band of frequencies while allowing all other frequencies to pass with only a slight loss. A band-pass filter passes a narrow band of frequencies with a very little loss while attenuating all other signals outside the band.

Cavity Filters are available up to 960 MHz with any type of connector that each customer specifies and are factory-tuned to the frequencies requested.

Duplexers and Diplexers

OPT HELLAS offers duplexers and diplexers in the frequency range of 136 MHz to 2500 MHz. The duplexers and diplexers serve essentially the same function; they connect two 50 Ω ports of the base transceiver system (two transmitters, transmitter and receiver or two receivers) at separate frequencies to a common 50 Ω antenna.

Duplexers combine receive and transmit systems, while diplexers combine two transmitters or two receivers. When duplexed, isolation between the two portions of the system is determined by the rejection of each filter path in the duplexer or diplexer. When ordering duplexers or diplexers, you must specify the Channel Spacing “ Split”, power handling, connector type, VSWR and type (Bandpass or Notch) because these are factory-stunned.

Coil Assemblies

Toroidal Inductors (RF and Power)
Bifilar and Trifilar
Transformers
SMT and Thru holes
Pot cores

The monitoring of our processes and the tests made during the manufacturing steps and at the final verification guarantees that the finished products comply with the customer’s specifications. Our goal is to supply quality products in accordance with the specifications of the customer at competitive prices.