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The concept is, greater the frequency less will be the size of antenna and weight. For example the Mobile Phone uses the half wave dipoles antenna. There is no exact formula for calculating these antennas. The problem is that there are several factors that affect the antenna. Fortunately there is a starting formula for these types of antennas. For center fed, wire dipole antennas, the formula is length of antenna = 468/freq (MHz). Mobile phone in GSM working on the frequencies 900 MHz and 1800 MHz so put the values in the formula you get your answer. If you move further in the frequency band the size will be more small.
What else can I help you with?
What kind of transformer whose purpose is to combine audio frequency signals with high frequency carrier signals in a radio transmitter?
The transformer used to combine audio frequency signals with high-frequency carrier signals in a radio transmitter is called a modulation transformer. This type of transformer effectively couples the low-frequency audio signals to the high-frequency RF (radio frequency) carrier, allowing for efficient transmission of the combined signals. It ensures minimal loss and maintains the integrity of both frequency components during the modulation process.
What is frequency in image processing?
In image processing, frequency refers to the rate at which pixel values change in an image. High-frequency components correspond to rapid changes in intensity, often associated with edges and fine details, while low-frequency components represent smoother areas and gradual intensity changes. Frequency analysis, such as through the Fourier Transform, allows for the separation and manipulation of these components, enabling techniques like filtering and image enhancement. Understanding frequency is crucial for various applications, including compression, noise reduction, and feature extraction.
Why low pass filters are required in demodulation process?
Demodulation takes place to extract the low-frequency signal from the high-frequency carrier, using a nonlinear process that produces components at the signal frequency. The LP filter is used to eliminate the high-frequency carrier component from the signal so that it does not cause problems at a later stage in the amplification of the signal.
How do you reduced second channel interference on superheterodyne receiver?
To reduce second channel interference in a superheterodyne receiver, one effective approach is to employ a narrowband filter at the intermediate frequency (IF) stage, which helps to eliminate unwanted signals outside the desired frequency range. Additionally, careful design of the local oscillator can minimize image frequency interference by ensuring that the IF frequency is sufficiently separated from the local oscillator frequency. Using high-quality components and proper shielding can also help reduce spurious responses and improve overall selectivity. Lastly, implementing automatic gain control (AGC) can help manage varying signal levels, further mitigating interference.
What is baritt diode?
It is a barrier-injection transit-time, a high frequency - semi - structural element of micro-electronics, as the diode is one of the electronic components.
Why high frequency component resolved in time than low frequency component?
low frequency fatigue is caused by small muscle tear and it takes time to repair this destroyed muscle high fatigue is cause by lactic acid accumulation that is why it takes time before the body converts it to glucose or other form by liver, heart or kidney
How differentiator acts as high pass filter?
A differentiator acts as a high-pass filter by amplifying high-frequency components of a signal while attenuating low-frequency components. In mathematical terms, it outputs the derivative of the input signal, which emphasizes rapid changes and thus filters out slower variations. Consequently, low-frequency signals, which change gradually, produce smaller outputs, while high-frequency signals that change quickly yield larger outputs. This behavior effectively allows the differentiator to pass high-frequency signals while blocking or reducing the strength of low-frequency signals.
What is convolution of a signal?
the convolution of a signal is to filter the components of the signal. The convolution does not mean the masking. Masking means it is going to remove all the masked components(both high and low frequency components).But convolution is going to remove any one (either low r high frequency) depending upon the filter response.
What does high frequency resolution mean?
High frequency resolution refers to the ability to distinguish between closely spaced frequency components in a signal or spectrum. It indicates the smallest frequency difference that can be detected or resolved by a measuring or analyzing system. A system with high frequency resolution would be able to distinguish between two frequencies that are very close to each other.
Give the difference between LPF and HPF?
LPF is a low pass LTI filter which passes the low frequency signals and reduce the amplitude of the signals with frequencies higher than the cutoff frequency. HPF is high pass LTI filter which passes the high frequencies and reduce the amplitude of the frequencies lower than filter's cutoff frequency.
How would your weight be affected if you climb to the top of Mt. Everest?
your weight will reduce as you go into high altitudes
How would you eliminate the high frequency noise in integrator?
To eliminate high frequency noise in an integrator, you can use a low-pass filter at the input of the integrator to block high frequency signals. You can also increase the integration time constant to filter out high frequency noise. Additionally, using a precision op-amp with good common-mode rejection can help reduce noise in the integrator circuit.
What kind of transformer whose purpose is to combine audio frequency signals with high frequency carrier signals in a radio transmitter?
The transformer used to combine audio frequency signals with high-frequency carrier signals in a radio transmitter is called a modulation transformer. This type of transformer effectively couples the low-frequency audio signals to the high-frequency RF (radio frequency) carrier, allowing for efficient transmission of the combined signals. It ensures minimal loss and maintains the integrity of both frequency components during the modulation process.
How much does a Tour de France bike weigh and what factors contribute to its overall weight?
A Tour de France bike typically weighs around 15-17 pounds. Factors that contribute to its weight include the frame material, components such as gears and brakes, wheels, and accessories like water bottle cages and pedals. Lighter materials and high-performance components are used to reduce weight and improve speed and efficiency.
Am demodulator diode detector circuit?
demodulator circuit is a circuit which is used for remove all high frequency components from modulated signal.
What is frequency in image processing?
In image processing, frequency refers to the rate at which pixel values change in an image. High-frequency components correspond to rapid changes in intensity, often associated with edges and fine details, while low-frequency components represent smoother areas and gradual intensity changes. Frequency analysis, such as through the Fourier Transform, allows for the separation and manipulation of these components, enabling techniques like filtering and image enhancement. Understanding frequency is crucial for various applications, including compression, noise reduction, and feature extraction.
Why low pass filters are required in demodulation process?
Demodulation takes place to extract the low-frequency signal from the high-frequency carrier, using a nonlinear process that produces components at the signal frequency. The LP filter is used to eliminate the high-frequency carrier component from the signal so that it does not cause problems at a later stage in the amplification of the signal.
