How do I increase the bandwidth of a microstrip patch antenna?

Bandwidth of antenna can be increased by various methods such as by increasing the thickness of substrate with low dielectric constant, by probe feeding, by cutting slot, by cutting notches and by different shapes of antenna.

How can I increase my slot antenna bandwidth?

By splitting two side slots of the Z-like slot antenna into two or three fingers, several additional resonances can be created. After careful optimization of the geometrical parameters of the antenna, the resonances are merged and thus a wide impedance bandwidth is obtained.

Why the microstrip antenna is narrow in bandwidth?

The major disadvantage of patches is their narrow bandwidth, due to the close spacing between patch and ground plane. Fig. 27 shows bandwidth versus substrate height in free space wavelengths, for VSWR < 2.

What is microstrip slot antenna?

Microstrip slot antennas are used in broad range of applications from wireless and satellite communication system to medical system, primarily due to their miniaturization,simplicity, inexpensive, conformability, light weight, low profile, reproducibility and ease of integration with solid state device [1-4].

How can I improve my antenna efficiency?

If concern is antenna efficiency then material losses (copper or dielectric losses) are an important factor. You can apply reflecting surfaces, active component, EBG structure or slot matching etc to improve radiation efficiency.

Which type of feeding has largest bandwidth?

Explanation: Proximity coupling feed provides largest bandwidth. Microstrip line feed limits the bandwidth due to increase in substrate thickness. Coaxial feed has narrow bandwidth. 10.

What is the gain of slot antenna?

The radiation pattern is almost omnidirectional in the horizontal plane perpendicular to the antenna over the 180° azimuth in front of the slot, but narrow in the vertical plane, with the vertical gain increasing approximately 3 dB with each doubling of the number of slots. The radiation is horizontally polarized.

How does a microstrip patch antenna work?

The microstrip consists of a very thin metallic strip placed on a ground plane with a dielectric material in-between. When the antenna is excited, the waves generated within the di-electric undergo reflections and the energy is radiated from the edges of the metal patch which is very low.

Why do we use microstrip patch antenna?

Microstrip patch antennae radiate primarily because of the fringing fields between the patch edge and the ground plane. For good antenna performance, a thick dielectric substrate having a low dielectric constant (<6) is desirable since it provides higher efficiency, larger bandwidth and better radiation.

What is the bandwidth of a slot antenna?

Slot Antenna. Slot radiators or slot antennas are antennas that are used in the frequency range from about 300 MHz to 25 GHz. They are often used in navigation radar usually as an array fed by a waveguide.

How does a slot antenna radiate?

Slot antennas operate on the principle that whenever a high-frequency field is present across the slot in a metallic sheet, then energy is radiated. This is the reason when a slot is cut from the surface of the conductive plate then on energizing the slot, the electromagnetic wave is radiated thus acts as an antenna.

How can I improve my microstrip antenna?

There are various methods to increase the bandwidth of microstrip patch antennas….you can try the below methods to increase antennas bandwidth.