These results show that wearable microstrip patch antenna has a high onbody performance. External impedance matching circuits are used for tunning of the antenna. Antennas using patches as constitutive elements in an array are also possible. Us patent for techniques for patch antenna patent patent. Abstract in this work a wearable gps adhesive copper sheet patch antenna on jeans fabric is designed, simulated and. The antennas directional rhcp radiation pattern and axial ratio below 3 db offers robust network connections, and allows radios to connect even when not directly facing one another or within. Embroidered patch structures with different stitch directions a horizontal pattern. Aoe has developed and demonstrated several bodyworn antenna architectures, including tunable bodyworn antennas that operate over more than an octave of bandwidth and use the human body to enhance antenna performance. In this paper, performance of a swastika slotultrawideband ss uwb patch antenna for an onbody application is investigated. The patch antenna is therefore a voltage radiator, as opposed to the wire antennas, which radiate because the currents add up in phase and are therefore.
Design and analysis of wearable antenna for wireless body area. This antenna provides a wider spectrum and greater portability. Body worn antennas southwest antennas high performance. In this paper, performance of a swastika slotultrawideband ss uwb patch antenna for an on body application is investigated. This radiation pattern shows that the antenna radiates more power in a certain direction than another direction. Please use the antenna search below to select your product, or call us for availability and pricing at 1 877 367. Onbody measurements of ssuwb patch antenna for wban. Uhf antennas antenna radiation patterns impedance matching microstrip antennas microwave antennas multifrequency antennas photonic band gap frequency 2.
A novel experimental procedure for digitizing flexible. Location tracking technology is used in conjunction with the antenna array 200 to select the optimal antenna from the array. For wearable applications, a semidirectional radiation pattern of the wearable patch antenna is preferred over an omnidirectional radiation of conventional dipole. Antenna types include ceramic patch, chip, dipole, omni, body worn, patch and many more. Performance of electrotextile wearable circular patch antennas in. The antenna array 200 is integrated within a body worn device 500 such as a belt, coat, or harness 210. Switchable electromagnetic bandgap surface wave antenna. The basics of patch antennas, updated orban microwave. Design considerations for indoor wireless transmission.
Higher righthand circular gain was measured for the patch antenna. In bodyloaded tests, the chip and hexafilar antennas demonstrated roughly equal radiation efficiency, but the hexafilar provided a significant rhcp advantage. Such antennas, for any applications in wireless body sensor. 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. The patch antenna of claim 1, wherein the conductive particles of the conductive particle based material are dispersed in the binder so that at least a majority of the conductive particles are spaced apart with the binder therebetween. Wearable antenna, bodyworn antenna, antenna in close proximity to human body, electrotextile antenna, wlan antenna. Request pdf body worn antennas two dual frequency band patch antennas are presented fabricated on clothing materials. Design and analysis of a compact band notch uwb antenna.
Lowprofile microstrip patch antenna for overbody surface communication at. This concept used by zhu in 9, in designing a dualband, body worn antenna. After the calculation is completed xfdtd finds the impedance of the patch antenna inside the human body to be 5. In the surface wave mode, the antenna has a monopolelike radiation pattern with a measured gain of 4. Sketch of antenna radiation requirements for an onbody channel. Design of bodyworn antennas is particularly challenging because of the effects the body has on antenna performance. Canadian journal of physics canadian science publishing. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. The radiation values of this antenna were analyzed. In this study, a metamaterialbased wearable microstrip patch textile antenna operating in industrial, scientific, and medical bands was designed and simulated. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. The antennas operate over the wireless network bands at. Bodyworn antenna is ideally used in military, mobile communication and. The microstrip antennas radiation arises from the fringing fields, which are due to the advantageous voltage distribution.
Body worn antenna design mark kleijnen rf designer philips innovation services. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. Typical half wave patches have efficiencies well above 90%. Comparable examples of work covering a similar frequency range were not identified in the literature. The authors 7 compared a sar level of dipole and wearable patch antenna. The patch antenna of claim 1, wherein the patch antenna is configured to be worn on a body of a person.
The antennas can be placed into or under clothing or against the skin and connected to a radiotransceiver device. Despite the powerful radiationblocking effects of the hypoallergenic patch, it doesnt interfere with your phones battery life or its normal behavior. Effect of rotating the patch antenna close to the human body. Performance of electrotextile wearable circular patch. Antenna product development alpha omega electromagnetics.
How to protect yourself from dangerous cell phone radiation. This paper presents a novel switchable electromagnetic bandgap surface wave antenna that can support both a surface wave and normal mode radiation for communications at 2. Analysis of different performance parameters of bodywearable. The results obtained indicate that the wearable antenna can provide required impedance and radiation characteristics even when it is placed in the vicinity of human body. Dual band body worn antenna ieee conference publication. Body absorbed radiation and design issues for wearable. The simulation results show that the antenna has an impedance bandwidth of 145% from 3. This paper is a study of wearable antenna design for wireless body area. Wearable antennas and sensors are placed inside the body, on the body or in its.
This antenna is comparable to standard whip antennas that come with most radios. The far zone radiation pattern for the patch antenna inside the body shows the reduction in gain due to the loss in the body tissues. Syb shield your body pocket patch is a thin, white, and extremely lightweight patch that can be easily ironed on to the inside of pockets, effectively reducing up to 99% of cell phone radiation. A patch antenna is a narrowband, widebeam antenna fabricated by etching the antenna element pattern in metal trace bonded to an insulating dielectric substrate, such as a printed circuit board, with a continuous metal layer bonded to the opposite side. The patch antenna for body worn network microstrip patch antennas are a good choice in wearable communication systems because they offer low profile, low back radiation and less detuning. Based on the s 11 measurement result infigure 5, creating the ebg layer. Comparison between the radiation patterns for free space and onbody test of the proposed antenna was simulated on 3. Dualband and multiband antennas are also available. Recent advances in fabrication methods for flexible antennas in. Wearable antenna, bodyworn antenna, antenna in close proximity to. Back radiation was reduced by 10 to 15 db while maintaining the impedance. In this paper, we analyze the performance of novel wearable multipleinputmultipleoutput mimo systems, which consist of multiple electrotextile wearable antennas distributed at different locations on human clothing. Can be used with cable assemblies and mount kits for flexible mounting. An antenna array 200 having a number of patch antennas 202, 204, 206, 208 forming a circumferential radius is provided.
Then metamaterialbased electromagnetic band gap ebg structure and wearable antenna integration was designed. The proposed antenna is a ssuwb patch antenna of dimension 27 mm. This body worn antenna is ideal for use in multi antenna mimo manet radio applications such as handheld and small form factor body worn tactical radios. Body worn antennas are designed for use with human or animal body worn applications, where the antenna is specifically designed and tuned for optimum performance on the body. Gps, wifi and ism frequencies are most popular but antennas are available up to kband. The effect on the pattern, the gain and the impedance matching of an antenna from the human body or high loss dielectric body as the distance between the antenna and the body becomes smaller and. The human body induced gain is the ratio of gains in db between bodyworn antenna and. The most common type of microstrip antenna is the patch antenna. These new antennas join their existing line of body worn antenna solutions, including options for l and s band radios. L conformal asymmetric meandered flare amf antenna for bodyworn.
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