Small antenna design for very compact devices and wearables

Abstract

In this study the authors present a possible solution for a compact printed folded dipole antenna, designed to match an nRF51822 Bluetooth Smart device. The use of a differential design avoids the need for a balun and the matching network between the IC and the antenna, therefore, reducing the power loss in these components. The performance of the proposed printed dipole is compared with the standard application of a quarter‐wave monopole antenna as proposed by the manufacturer and a commercial ceramic antenna. It is shown that the proposed design presents better radiation properties than the other two approaches, which resulted in an increased communication range of the system by 50%. Measurements are compared with simulation to attest the validity of the authors’ proposal.

A Wideband Microstrip Patch Antenna with Integrated Circular Slot for RF Energy Harvesting

“…Electromagnetic waves is transmitted by antenna which is taken as an input for FWBR circuit. Diode D1 is forward bias and D2 is also forward bias in positive half cycle, the diode D1 is forward bias from the positive half cycle and diode D2 is from the negative half cycle and vice versa [12]. Simulated result of bridge rectifier confirms that element chosen within rectifier are capable of operating within the input frequency vary.…”

“…The RF dc conversion strength depends on i/o power of rectifier. Maximum the input power more is the dc conversion strength of rectifier [10][11][12][13][14]. For converting RF power into DC power full wave bridge rectifier is used.…”

Low‐cost, low‐profile and miniaturized single‐plane antenna design for an Internet of Thing device applications operating in 5G, 4G, V2X, DSRC, WiFi 6 band, WLAN, and WiMAX communication systems

“…In Refs. , the authors used a modified inverted‐F antenna (IFA) or monopole structure with multiple branches to create multiband operation and in line with the application of wireless communication devices in Bluetooth/WLAN, WiMAX, and Wi‐Fi. In References and , planar inverted F‐type and monopole antenna with broadband design are proposed.…”

“…So far, monopole antenna design with multiband operation technology is an attractive and promising solution, which recently discussed and proposed one of many novel antenna technologies. [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] In Refs. 17-20, the authors used a modified inverted-F antenna (IFA) or monopole structure with multiple branches to create multiband operation and in line with the application of wireless communication devices in Bluetooth/WLAN, WiMAX, and Wi-Fi.…”

“…The ground plane is close to the ground plane size of 8 mm × 35 mm, which is very small. Compared to the antenna proposed in the literature, [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] the proposed antenna can achieve a compact and small size. The performance of the proposed antenna is analyzed by high frequency finite element simulator and the measurement is verified in the anechoic chamber.…”