Active Antenna Circuit for 10KHz to 100MHz
The active antenna described operates effectively across a frequency range spanning from 10 KHz to 100 MHz, making it suitable for various applications including radio communications, amateur radio, and other RF signal processing tasks. The antenna's physical dimensions are flexible, with a recommended length between 0.5 to 1 meter, which can be adjusted to optimize performance based on specific usage scenarios and environmental factors.
Power consumption for this design is notably efficient, ranging between 20 to 30 mA, which is critical for battery-operated or low-power applications. This aspect allows the antenna to function without excessive drain on power sources, enhancing its usability in portable devices.
To ensure optimal signal integrity and minimize losses, it is advised to utilize the shortest possible cable length between the antenna and the associated transistor. This minimizes the potential for signal degradation caused by cable capacitance and resistance. The recommended cable types are 50 or 75 Ohms, which are commonly used in RF applications. The choice between these impedances may depend on the specific application requirements and the impedance of the connected components.
In terms of the schematic, the active antenna typically includes a low-noise amplifier (LNA) to boost the received signals before they are processed further. The LNA should be placed as close to the antenna as possible to maximize the signal-to-noise ratio. Proper grounding and shielding techniques should also be employed to mitigate interference from external sources, which can significantly impact performance.
Overall, this active antenna design presents a reliable solution for receiving signals in the specified frequency range, while maintaining efficiency and performance through careful selection of components and layout considerations.This active antenna schematic can be used to frequency range from 10 KHz to 100 MHz. The length of the Antenna can be between 0.5 to 1 meter long. The power consumption is 20-30mA. Use the shortest posible length of cable between the antenna and the transistor. Cable 50 or 75 Ohms is suggested, for both input and output.
Related Circuits
The UTC7642 is designed for use in low voltage portable radio cassette systems and other wireless AM systems. It is packaged in a TO-92 casing. The manufacturer is LianShun Electronics Co., Ltd. The UTC7642 is a low-voltage operational amplifier...
The circuit depicted in Figure 3-154 illustrates the KM3 braking contactors. During shutdown, the system can disconnect the operating system. At this point, KM3 activates, causing its normally open contact to close, thereby shorting the three-phase stator windings to...
The tester comprises a dual time base circuit using a 556 timer and various RC components. The right side of the circuit features the 556 timer (556 1/2) along with resistors R2, R3, capacitors C2, C3, and additional components...
The problem with class-B amplifier design is that we start with an output stage in two halves, each with a non-linear response, which we then add together to try to give a linear response, i.e. so that a graph...
The circuit operates on the principle that insects, such as mosquitoes, can be repelled using sound frequencies in the ultrasonic range (above 20 kHz). It utilizes a Phase-Locked Loop (PLL) integrated circuit, specifically the CMOS 4047, configured as an...
The CD 4047 is a low-power monostable and astable multivibrator that requires only an external capacitor and a resistor to produce output pulses. The CD 4047 integrated circuit (IC) is designed for generating precise timing pulses and can operate...