Amstech imports and distribute Passive components from the leading manufacturers for different usage in frequency range of 140 Mhz up to 5.8 Ghz.
RF connectors for variety usage, RF components, coaxial attenuators, directional coupler, power splitters/dividers, dummy/termination loads, mounting kits and waveguides.

For specification (PDF files) please press the subject:

An attenuator
is an electronic device that reduces the amplitude or power of a signal without appreciably distorting its waveform.
An attenuator is effectively the opposite of an amplifier, though the two work by different methods. While an amplifier provides gain, an attenuator provides loss, or gain less than 1.
Attenuators are usually passive devices made from simple voltage divider networks. Switching between different resistances forms adjustable stepped attenuators and continuously adjustable ones using potentiometers. For higher frequencies precisely matched low VSWR resistance networks are used.
Fixed attenuators in circuits are used to lower voltage, dissipate power, and to improve impedance matching. In measuring signals, attenuator pads or adaptors are used to lower the amplitude of the signal a known amount to enable measurements, or to protect the measuring device from signal levels that might damage it. Attenuators are also used to 'match' impedances by lowering apparent SWR.

coaxial RF connector
is an electrical connector designed to work at radio frequencies in the multi-megahertz range. RF connectors are typically used with coaxial cables and are designed to maintain the shielding that the coaxial design offers. Better models also minimize the change in transmission line impedance at the connection. Mechanically, they provide a fastening mechanism (thread, bayonet, braces, push pull) and springs for a low ohmic electric contact while sparing the gold surface, thus allowing above 1000 reconnects and reducing the insertion force. Research activity in the area of radio-frequency (RF) circuit design has surged in the 2000s in direct response to the enormous market demand for inexpensive, high-data-rate wireless transceivers.
Standard types
•    7/16 DIN connector, a high-power 50 Ω connector
•    BNC connector (Bayonet Neill-Concelman)
•    Blind mate BMA, also known as OSP (Omni Spectra push-on)
•    C connector (Concelman)
•    Dezifix connector, hermaphrodite connector
•    F connector, used for domestic television installations and domestic satellite LNBs (75 Ω) world wide.
•    GR connector (General Radio)
•    HN connector, a high voltage version of the N connector
•    IEC 169-2 connector, also called Belling Lee connector or PAL, used throughout Europe and some other countries for domestic television installations and as FM connector for radio. It is standardized in EN 60169-2.
•    MiniQuick
•    Motorola connector, standard AM/FM antenna connector used for automotive radios
•    Musa connector, a 50 Ω connector used in telecommunications and broadcast video
•    N connector (Neill)
•    NMO mount (new Motorola mount), for removable mobile antennas. Large threaded base for durability in wind.
•    SC connector, screw version of C connector
•    SMA connector, SubMiniature version A - also listed below in SubMiniature - is a very popular lab equipment standard connector.
•    TNC connector (threaded Neill-Concelman)
•    DIN 1.0/2.3, a 75 Ω connector
•    Twin lead
•    UHF connector (e.g., PL-259/SO-239). Also referred to as an M-type connector by Japanese manufacturers such as Kenwood
Power dividers
(also power splitters and, when used in reverse, power combiners) and directional couplers are passive devices used in the field of radio technology. They couple a defined amount of the electromagnetic power in a transmission line to a port enabling the signal to be used in another circuit. An essential feature of directional couplers is that they only couple power flowing in one direction. Power entering the output port is coupled to the isolated port but not to the coupled port.
Directional couplers are most frequently constructed from two coupled transmission lines set close enough together such that energy passing through one is coupled to the other. This technique is favoured at the microwave frequencies the devices are commonly employed with. However, lumped component devices are also possible at lower frequencies. Also at microwave frequencies, particularly the higher bands, waveguide designs can be used. Many of these waveguide couplers correspond to one of the conducting transmission line designs, but there are also types that are unique to waveguide.
Directional couplers and power dividers have many applications, these include; providing a signal sample for measurement or monitoring, feedback, combining feeds to and from antennae, antenna beam forming, providing taps for cable distributed systems such as cable TV, and separating transmitted and received signals on telephone lines.