We manufacture and export gunn diode, also known as a transferred electron device. This is a form of diode used in high-frequency electronics. It is somewhat unusual in that it consists only of N-doped semiconductor material, whereas most diodes consist of both P and N doped regions. In the Gunn diode, three regions exist: two of them are heavily N-doped on each terminal, with a thin layer of lightly doped material in between.

The oscillation frequency is determined partly by the properties of the thin middle layer, but can be adjusted by external factors. Gunn diodes are therefore used to build oscillators in the 10 GHz and higher (THz) frequency range, where a resonant cavity is usually added to control frequency. The resonator can be based on a waveguide, coaxial cavity and YIG resonator.

Microwave Counter Power Meter DVM is a full-featured 20 GHz CW microwave counter, a true power meter, and a dc DVM all in one small, convenient package. It is the ideal tool for installation and maintenance of point-to-point microwave links as three of the most commonly made field measurements are combined into one instrument. In ATE systems, the three-in-one 53147A will also save valuable rack space.

Key Specifications

• Single, ultra-wide band CW microwave counter input, 50 MHz to 20 GHz
• High resolution/accuracy +/- 50 Vdc DVM
• GPIB and RS-232 interfaces standard

We also offer full featured 26.5 GHz CW microwave counter, a true power meter, and a dc DVM all in one small, convenient package. It is the ideal tool for installation and maintenance of point-to-point microwave links as three of the most commonly made field measurements are combined into one instrument. In ATE systems, the three-in-one 53148A will also save valuable rack space.

Key Specifications

• Single, ultra-wide band CW microwave counter input, 50 MHz to 26.5 GHz
• High resolution/accuracy +/- 50 Vdc DVM
• GPIB and RS-232 interfaces standard

We provide high efficiency wave guide thermistor mounts. Used in conjunction with the 432A power meter, they provide high accuracy even in routine power measurements. These thermistor mounts are temperature compensated for low drift, even in the presence of thermal shocks, permitting measurement of microwave power as low as one micro watt. Each mount contains data showing calibration factor and effective efficiency at six frequencies. Some features of this product are mentioned below

• High accuracy even in routine power measurements
• Temperature compensated for low drift
• Measures microwave power as low as one micro watt
• Shows calibration factor and effective efficiency at six frequencies
• Frequency Range: 12.4 to 18.0 GHz
• Maximum SWR: 1.5

We manufacture a complete line of standard wave guide products and custom Military and Commercial telecommunications and satellite-based systems.

We manufacture and supply Microwave Test Bench Microwave Test Bench:

• Study of the characteristics of Klystron tube and to determine its electronic tuning range.
• To determine the frequency in a rectangular wave guide working on TE mode. 10
• To measure the polar pattern and the gain of following antennas.
• Standard Gain Horn - Pick up horn
• Slotted Broad Wall - Slotted Narrow Wall
• Dielectric Antenna - E-plane Sectorial Horn
• H-Plane Sectorial Horn - Pyramidal Horn - Parabolic Dish
• To study the square law behavior of a microwave crystal detector.
• To study the voice communication by using microwave test Bench.
• Also available with PC based motorized unit (Model ST1001)
• To study the variable attenuator.

The dependency of rf impedance on i-f impedance in diode mixers is clarified by visualizing the mixer as a frequency-changing attenuator. The contributions of series diode resistance to impedance and conversion loss are calculated. Microwave circuits for measuring and matching mixing diodes are presented to simulate properly the mixing environment in the measurement.

Klystron Power Supply
Klystron Power Supply, Model KPS-151, is a state-of-the-art solid state, regulated power supply for operating low power Klystrons such as 2K25, 723 A/B, RK 5976, 726, K-19 etc. In addition to AM and FM modulation of Beam current, a provision for externally modulating the klystron supply with desired signal wave form has been provided. Model KPS-151 utilizes quality components, rugged construction and ergonomically designed front panel. A careful handling of the instrument will provide years of trouble free service.

The SWR meter or VSWR (voltage standing wave ratio) meter measures the standing wave ratio in a transmission line. This is an item of radio equipment used to check the quality of the match between the antenna and the transmission line. The VSWR meter should be connected in the line as close as possible to the antenna. This is because all practical transmission lines have a certain amount of loss, causing the reflected power to be attenuated as it travels back along the cable, and producing an artificially low VSWR reading on the meter. If the meter is installed close to the antenna, then this problem is minimized.

Gunn Oscillators utilize the bulk negative conductance properties of Gallium Arsenide (GaAs) and Indium Phosphide (InP) Gunn diodes to convert direct current (dc) into power at millimeter wave frequencies. Circuits incorporating the Gunn diodes are designed to provide state-of-the-art performance at frequencies from 18 GHz to above 120 GHz. InP Gunn Oscillators yield higher output power, higher efficiency, and lower AM noise than their GaAs counterparts. Tunable models feature high power-bandwidth products. Custom units are available to meet special customer requirements. ZAX is continuously advancing the state-of-the-art with new models to meet the highest performance requirements.

A klystron is a specialized linear beam vacuum tube (evacuated electron tube). They are used in technologies for very high-power applications, such as synchrotron and radar systems. Klystrons are used as an oscillator (such as the reflex klystron) or amplifier at microwave and radio frequencies to produce both low-power reference signals for superheterodyne radar receivers and to produce high-power carrier waves for communications and the driving force for linear accelerators.

Diode, which is the heart of electronic circuits are devices that allow current to pass in one direction but not in the other. We manufacturer and supply these diodes as

• Impatt Diode
• Impatt Diode Trapatt
• Tunnel Diode
• Pin Diode

We have a wealth of scientific and technical expertise, giving us a unique ability to innovate in microwave engineering design. High standards ensure highest quality finished products with excellent performance. Standard and special projects alike benefit from our experience and expertise. Our microwave antenna are used extensively in test and measurement, and by many universities and academic institutions around the world.