Antennas play a major role in modern communication systems. Nowadays, mobile equipment is required lo cover various communication services (Wi-Fi, Bluetooth, GPS, LTE and VOLTE) Each service is offered at different frequencies, so a separate Antenna issued uniquely for every single application. In various mobile communication services, long-term evolution (LTE) is one of the widely used communication systems as a fourth-generation wireless service. Because each nation or wireless carrier uses different frequency bands, a multiband antenna is desirable. Moreover, the role of multiband antennas becomes more important because the carrier aggregation technique of LTE-Advanced communication system has been released. In this invention we design a Swastik slot loaded rectangular microstrip antenna fed by a microstrip line and then analyze its performance. It consists of a rectangular patch with Swastik-shaped slot on the substrate (30*30* 1.6mm3). Here, we use FR-4 epoxy substrate. The proposed antenna is designed by using HFSS simulation tool. This antenna design operates over a lower frequency of 2.2 GHz and resonant frequencies of 4.1 GHz, 4.7 GHz, 5 GHz, and 6.4 GHz with VSWR < 2. These characteristics make the designed antenna suitable for various S-band, WLAN and C-band applications. The proposed antenna structure exhibits good impedance matching, radiation characteristics and gain at their operational bandwidths.
Intro:
Now a day's wireless communication devices needed more and more frequency bands because of increasing wireless service requirements. As these devices also wants smaller dimensions for the real estate, antennas need to smaller their dimensions and more than one operating frequency bands while maintaining their performance. Due to this specification the demand for multiband antenna design is increasing continuously.
Multiband antennas have derived rapidly increasing attention in modern wireless communication systems in which the downward compatibility and the roaming capability among multi-standards are demanded. For example, (i)The global system for mobile communication (GSM), (ii)The general packet radio service (GPRS). (iii)The wire-less local area networks (WLAN), (iv) The universal mobile telecommunications system (UMTS) are generally a dual band or multiband wireless standards communication devices. Due to the gradually development of electronics and wireless communications, the requirement for mobile devices Operating at different standards or for different applications is extending. So, on the other hand, wireless communication systems are developing toward multi-functional devices. There are fixed and reconfigurable antennas are used for the multiband operation. A frequency reconfigurable antenna is more popular for multi-functionality operation due to their switching and tunable characteristics, impedance bandwidth, operating frequency, radiation pattern, and polarization, which is a well-suited for it.

antennas have the tack of poor voltage standing wave ratio (VSWR) of the dual notched band antennas, this is the common factor all of these structures for dual band antennas. Due to lack of low VSWR, some UWB planar antenna structures with dual notched bands are reported in the literature. The UWB planar antenna is reported that have a T-slit on the top of radiating patch and U-stub besides the feeding line and the dual bands are achieved by using T and U-shaped. In [9] and [10], different shapes of the slots like square, ring and folded trapezoid are used to obtain the desired band notched characteristics of antenna. Single and multiple [11] half-wavelength U-shaped is used for the frequency band-notch function and the modified planar slits are inserted in the radiation patch to achieve the single and multiple band-notched functions, respectively. Band-notch function is also achieved by using a T-shaped coupled parasitic element in the ground plane in [12].
Recently, many techniques have been used to increasing the antenna bandwidth with the truncated ground plane with use of an L-shaped notch in the lower corner [13], [14] and an inverted T-shaped notch in the middle [15]. For increasing the resonance frequency, two new slots are used in the ground plane and the bandwidth of antenna is increased by using these slots [16]. However, these antennas are not fulfilling the complete requirement of multiband operation for wireless technology.
Methedology:
A number of multiband antennas with compactness have been proposed, and various techniques like slot operations have been used to achieve the multiband operation. The mainly used methods are etching slots on the patch or on the ground plane, for examples H-shaped slot, U-shaped slot, C-shaped slot , etc. There are another technique is use of parasitic strips near the radiation elements or the ground plane for achieving the notched band and multi-functionality.
Most of the previous researches have been adapted the single-notched-band design; few researches have been focused on dual-notched-bands design. Inthe proposed paper the Penta-band have been achieved by adding the Swathika Shaped slot in the radiating patch element and square slot in the ground plane, by the inserting of slots , the desired Penta bands have been obtained. Recently, multi-band antennas for multiple applications have received huge attention from researchers due to their efficient utilization of frequency spectrum. The need for one antenna which can cover multiple application bands is always desirable in a modern wireless communication system. Antennas having independently controllable bands have gained much consideration due to the scarcity of the radio frequency spectrum.
The design of multiband antenna with slotting has been studied theoretically and experimentally by many researchers. The techniques used to compute this are based on transmission line model-According to the previous works of researchers it can be observed that there are some specific patch patterns or shapes which have the inbuilt tendency of showing multi-frequency characteristics. Conductively connected cross dipoles, Vivaldi antennas, Bow-tie patches, spiral shapes are some of them.
The objective of this research work is to design a Swastik slotted multiband antenna with

slotted ground structure and metamaterial for S-band, WLAN and C-band applications. We use the Swastik slot to lower the overall impedance, resulting in better impedance matching and, as a result, higher bandwidth.
The proposed antenna is designed by using HFSS simulation tool. This antenna design operates over a lower frequency of 2.2 GHz and resonant frequencies of 4.1 GHz, 4.7 GHz, 5 GHz, and 6.4 GHz with VSWR < 2. These characteristics make the designed antenna suitable for various S-band, WLAN and C-band applications. The proposed antenna structure in detail dimension are represented in Fig. 1 and exhibits good impedance matching, radiation characteristics and gain at their operational bandwidths. The overall methodology of the proposed antennas is illustrated in Fig. 2.
(1) First, a desirable shape is selected for the patch antenna.
(2) Substrate selection is the next practical step in designing the patch antenna. The structure of the proposed antenna in this project utilizes dielectric material FR4 with the dielectric constant of 4 as the substrate.
(3) Then slots are created on the patch and ground plane. Necessary parametric analysis is carried out to study the effect of varying the dimensions of feed width and slots.
(4) Model is simulated and analyzed in HFSS. Upon obtaining desirable simulation results, the design is finalized and is fabricated.
(5) The final characteristic analysis is done with the fabricated antenna.
Results :
The proposed antenna is designed by using HFSS simulation tool. This antenna design operates over a lower frequency of 2.2 GHz and resonant frequencies of 4.1 GHz, 4.7 GHz, 5 GHz, and 6.4 GFIz with VSWR < 2. These characteristics make the designed antenna suitable for various S-band, WLAN and C-band applications. The proposed antenna structure exhibits good impedance matching, radiation characteristics and gain at their operational bandwidths. The simulated SI 1 characteristics of the antenna are illustrated in Fig. 3. The proposed antenna has impedance matching better than -10 dB return loss for resonant frequencies 2.2 GHz, 4.16 GHz, 4.7 GHz, 5.02 GHz and 6.4 GHz respectively. The input impedance is noted to be near 50 Ohm at respective resonances, which shows sufficient impedance matching at these frequencies.
The proposed multiband antenna operates at five bands with SI 1<-10 dB bandwidth of about 50 MHz (2.175-2.225 GHz), 250 MHz (4-4.25 GHz), 100 MHz (4.65-4.75 GHz), 250 MHz (4.9-5.15 GHz) and 200 MHz (6.2-6.6 GHz), respectively as presented in Fig. 10. All resonating bands fulfils the criteria of good impedance matching (SI K-10dB) and acceptable gain. The obtained bandwidth is sufficient to meet the requirements of S-band, WLAN and C-band applications.
Fig. 4 shows that the proposed antenna has return loss of-10.88 dB at 2.2 GHz, -20.94 dB at 4.16 GHz, -13.12 dB at 4.7 GHz, -33.23 dB at 5.02 GHz and -15.73 dB at 6.4 GHz.

Conclusion:
A compact planar Swastik slotted multiband antenna is presented in this research. The dimensions of the antenna are 30 * 30 * 1.6 mm 3. The antenna exhibits good impedance matching and has stable radiation patterns. Parametric investigations are carried out to judge the effect of important parameters on antenna performance. Changes in slots dimensions affect the impedance matching of the antennas, which has been depicted in the parametric analysis. The targeted frequencies 2.2, 4.1. 4.7. 5. and 6.4 GHz of the proposed antenna easily meet the S-band, WLAN and C-band requirements. The antenna has the advantage of high bandwidth, ease of design, five-band of operation, high gain, and stable radiation pattern; thus, making the proposed design a competitive candidate for the aforesaid application.
Claims:
1. A compact planar Swastik slotted multiband antenna is presented in this research. The dimensions of the antenna are 30 x 30 * 1.6 m m3. The antenna exhibits good impedance matching and has stable radiation patterns.
2. The invented design exhibits the multiband antenna, operates at five bands with S11<-10 dB bandwidth of about 50 MHz (2.175-2.225 GHz), 250 MHz (4-4.25 GHz), 100 MHz (4.65-4.75 GHz), 250 MHz (4.9-5.15 GHz) and 200 MHz (6.2-6.6 GHz), respectively the obtained bandwidth is sufficient to meet the requirements of S-band, WLAN and C-band applications.