## 2 Results and Analysis  
Figure 3 elevates the structural view of the proposed antenna, impedance smith chart plot and prototyped antenna on FR4 substrate material. An impedance value of 50 ohm is attained at resonant frequencies from Figure 3b and the dimensions of the prototyped antenna in millimetre. Figure 4 projects the scattering parameter S11 result of the designed antenna and the working range. Antenna resonating between 2.5-4.4 GHz with a 500 MHz bandwidth and 5.7-7 GHz with a bandwidth of 1000 MHz. A clear notching can be observed from 4.4-5.7 GHz with 1300 MHz bandwidth. Figure 5 shows the impedance plot of the antenna model with respect to the working and notch band. It projects the obtained impedance value of very high in the notch band. Figure 2: Notch Band Trapezoidal Monopole Antenna, (**a**) Dimensional Look, (**b**) Side Look. Figure 6 shows the simulated VSWR-Voltage standing wave ratio plot from the EM-tool and obtained measurement results of VSWR on an aniritsu combinational device analyser. The ratio of 2:1 is perfectly aligned in the operating region and in good matching with the simulation. Dotted line is idle impedance for reference and solid line is the original result which is attained from proposed method. Figure 4: Reflection coefficient of notch band monopole. Figure 5: Impedance plot with Frequency in GHz. Figure 3: Notch band Monopole, (**a**) Side View, (**b**) Smith Chart. The Peak Realized Gains at Different Frequencies  
Different Frequency Peak Realised Gains: 2.5 GHz. At 2.5 GHz, the antenna has [Peak Gain Value] dBi. This gain number shows the antenna's ability to focus and radiate signals at this frequency. An antenna with a higher gain at 2.5 GHz is well-optimized for this frequency and can provide improved coverage and signal propagation in this band. The solid line in above Figure 6 explains about VSWR variations at different frequencies. 3.4 GHz: The antenna's peak gain is [Peak Gain Value] dBi at 3.4 GHz. Antenna efficiency in emitting 3.4 GHz signals is shown by this gain level. The antenna's 3.4 GHz gain implies it can transmit and receive signals in this frequency band. 5.8 GHz: At 5.8 GHz, the antenna has [Peak Gain Value] dBi. The antenna's 5.8 GHz performance and propagation are shown by this gain test. A high gain at 5.8 GHz indicates that the antenna can cover this spectrum well and communicate reliably. Analysis: Peak realised gains at different frequencies demonstrate the antenna's versatility and efficiency in processing signals across frequencies. A well-matched and optimised antenna with a high peak gain at a given frequency is useful for applications targeting that band. In modern wireless systems that operate in many frequency bands, the antenna's ability to sustain reasonable gain values across different frequencies shows its versatility in multi-band communication settings. These gain values indicate the antenna's radiation efficiency and signal propagation. Higher gains increase communication quality and coverage by strengthening, transmitting, and receiving signals. While the chosen keywords (ISM, LTE, Wi-MAX, WLAN) aptly reflect the antenna's relevance, consider providing a context within the abstract about how the antenna aligns with and addresses the challenges in these communication technologies. Radiation Analysis: Figure 7 projects the obtained radiation parameters of the antenna at three different operating bands collected from CST tool. Antenna showing 2.4 dB, 4.7 dB and 5.1 dB gain at 2.5, 3.4 and 4 GHz, respectively. Figure 8 projects the radioactivity performance features of the proposed model at 3 different working groups that are taken from the Antenna magus tool. Antenna showing 2.4 dB, 3.5 dB and 4.7 dB gain at 2.5, 2.8 and 3.4 GHz, respectively. The polar as well as three dimensional representations are presented here for azimuthal and elevation angles. Figure 6: VSWR values Measurement plot on screen.