Astra Microwave Products Interview Questions and Answers

The symbol for an NPN transistor consists of an arrow pointing outwards from the base.

• NPN transistors have three layers: N-type semiconductor between two P-type semiconductors

• The arrow points away from the base terminal

• Commonly used in amplification and switching circuits

Ohm's law defines the relationship between voltage, current, and resistance in an electrical circuit.

• Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it, and inversely proportional to the resistance of the conductor.

• The formula for Ohm's law is V = I * R, where V is voltage, I is current, and R is resistance.

• It is named after German physicist Geor...read more

Power is the ability to influence or control others, resources, or events.

• Power can be derived from various sources such as wealth, knowledge, authority, or physical strength.

• Power can be used for both positive and negative purposes, such as empowering others or manipulating situations.

• Power dynamics exist in various relationships and institutions, shaping interactions and outcomes.

• Examples of power include politi...read more

The essence of a radar system is to detect and track objects using radio waves.

• Radar systems use radio waves to detect and track objects in the surrounding environment.

• They work by emitting radio waves and then measuring the time it takes for the waves to bounce back after hitting an object.

• The radar system then analyzes the returned waves to determine the distance, speed, and direction of the object.

• Radar systems...read more

RF & MW stand for Radio Frequency and Microwave respectively. They are both forms of electromagnetic radiation.

• RF has a frequency range of 3 kHz to 300 GHz while MW has a frequency range of 300 MHz to 300 GHz.

• RF is used for communication purposes such as radio and television broadcasting, mobile phones, and Wi-Fi.

• MW is used for cooking food in microwave ovens, radar systems, and satellite communication.

• Both RF and...read more

I have extensive experience using network analyzers for RF testing, including S-parameter measurements and device characterization.

• Used a Keysight N5247A PNA-X for high-frequency S-parameter measurements.

• Conducted gain and phase measurements on RF amplifiers using a network analyzer.

• Performed time-domain reflectometry (TDR) to analyze transmission line integrity.

• Utilized a Rohde & Schwarz ZVA for multi-port ne...read more