How do you increase the gain of a microstrip patch antenna?

5. Conclusion. A unidirectional and low profile microstrip patch antenna of 0.069 has been introduced. Using a second layer of FR-4, which is coated with copper, reduced the back lobe and enhanced the gain up to 5.4 dB as well as increased the directivity up to 7.74 dBi with F/B ratio of 9.5 dB.

How does the antenna bandwidth affect antenna’s performance?

Antenna’s have a rated bandwidth of frequencies on which they operate. I understand that the antenna will still operate outside these frequencies, just that the signal will experience a greater attenuation at frequencies outside this range (like a filter’s passband).

What affects antenna bandwidth?

Bandwidth describes the range of frequencies over which the antenna can properly radiate or receive energy. Also, the radiation pattern will vary with frequency. In general, the shape of the radiation pattern does not change radically. There are also other criteria which may be used to characterize bandwidth.

How can the gain of an antenna be improved?

Therefore, antennas primarily increase their gain by concentrating the signal over a smaller area. For example, an omnidirectional antenna that transmits and receives signal in all directions will generally have a smaller gain then a directional antenna that transmits and receives a signal in only one direction.

What is a good antenna gain?

If you mount a TV antenna on your roof, and know the tv broadcast antennas are to the south (for example, on some hill south of the city), then it is preferred to have a high gain antenna. Antennas with gain of at least 12-15 dB are preferred.

What is the principle used in slot antenna?

Babinet’s principle
4. What is the principle used in slot antennas? Explanation: Babinet’s principle is used in slot antenna. It relates the fields obtained directly by slot antenna with corresponding complementary strip dipoles.

What factors determine antenna bandwidth?

Antenna beamwidth determines the expected signal strength given the direction and radiation distance of an antenna. The beamwidth will vary given a number of different factors such as the antenna type, design, orientation and radio frequency.

How can I increase the bandwidth of my antenna system?

In the meantime, here are some generic suggestions of ways to increase bandwidth of an antenna system: Use a log-periodic antenna. There are many existing commercial antenna models that use a log-periodic for the 174–216 MHz VHF television band. Use a discone antenna. Redesign the radio to tolerate a larger impedance mismatch.

How to increase the bandwidth of a microstrip patch antenna?

For example by decreasing the Q-factor of the patch and by increasing the substrate height and lowering the dielectric constant the bandwidth of microstrip patch antennas can be increased. Another way could be use of multiple resonators located in one plane.

How to increase the bandwidth of a dipole dipole?

Below for “calibration” is a comparison of a case where the radius of the conductors stated in the OP was increased by a factor of 5: You can increase the bandwidth of a dipole by adding capacitive hats (you may have to shorten the dipole to maintain a given resonant frequency).

What is the best shape for a dipole antenna?

Conical hats, hemispherical hats, or hats with a circular rim will work better than short 90 degree radial spikes at the ends, or an H shaped dipole. Small capacitive hats might even raise the radiation resistance, as well as broadening the dipole’s bandwidth.