An array of 16 wire patch antenna wpa fed by an integrated 16 ways power. Gain enhancement of a microstrip patch antenna using a reflecting. The beamwidth is similar in both the x and y planes, creating roughly a cone of radiation outward from the patch. I have designing microstrip patch antenna and was getting gain and directivity as around 9. The 3d radiation pattern of the designed antenna and 23. Hfss simulation of radiation pattern of patch antenna with. Lightweight silver ink printed circular ring microstrip patch. The proposed antenna provides high radiation efficiency and a peak gain of about 8 db at the resonant frequencies with reduced side lobe levels. Keywords radiation efficiency, rectangular microstrip patch antenna, resonating frequency, total efficiency. The proposed dual layer microstrip patch antenna has an impedance. International journal of networks and communications 2018, 82. This would be an antenna with a perfect fronttoback ratio where all radiation occurs towards the front and no. Microstrip antennas have high q q 100 is common, which means that they have small bandwidths. The directivity of patch antennas is approximately 57 db.
Although the maximum radiation gain of the antenna without metamaterial is 8 db fig. The bandwidth of a single patch microstrip antenna does not exceed 2% and its gain is limited to 58 db. Next well consider more aspects involved in patch microstrip antennas. Generation of broadband highpurity dualmode oam beams. Normalized radiation pattern for microstrip patch antenna. This causes radiation at the two edges of the antenna, as shown by the fringing fields in. The fundamentals of patch antenna design and performance. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain.
The geometries of the circular patch antennas excited by two feeds and. Fundamental specifications of patch antennas radiation pattern a patch antenna radiates power in certain directions and we say that the antenna has directivity usually expressed in dbi. Measured circular ring patch antenna eplane copol radiation pattern. The fields are linearly polarized, and in the horizontal direction when viewing the microstrip antenna as in figure 1a well see why in the next section. The fields of the microstrip antenna are plotted in figure 2 for wl0. Controlling radiation pattern of patch antenna using transformation. For typical patch construction, the 3 db beamwidth is about 65 degrees, or 32. Directional patch antenna array design for desktop wireless internet. This type of isotropic antenna is said to have no gain. The slot radius was chosen through sweeping the radius in the simulation from zero to 8 mm. Compact dual band antenna design for ku ka band applications. But i was getting the value of efficiency in negative.
Substrate, gain, radiation pattern, patch antenna scientific. Radiation pattern of the microstrip patch antenna figure 3. This paper presents the design of mimo microstrip antennas with 8 elements. Results the designed microstrip patch antenna with four slits and a pair of truncated corners are simulated using cadfeko for finding the electric far field radiation, gain, directivity, radiation pattern e. That simply means that all directions have the same energy radiation, and are all equal to the average energy radiation. No gain can be expressed in linear terms like x1 times 1. Typical half wave patches have efficiencies well above 90%. Measured circular ring patch antenna s11 db at wlan. Improvement of efficiency parameter of a microstrip patch. Theoretical analysis of a fourfeed circular patch antenna with cp oam modes. Microstrip antenna an overview sciencedirect topics.