Design of a Short/Open-Ended Slot Antenna with Capacitive Coupling Feed Strips for Hepta-Band Mobile Application

Keum, Kyoseung; Piao, Haiyan; Choi, Jaehoon

doi:10.26866/jees.2018.18.1.46

Cited by 9 publications

(3 citation statements)

References 10 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As alluded previously, the slot-type Doppler radar antenna [19] is designed in this work, since slot antennas are less affected by human body effects compared to other antennas. Figure 1a shows the overall view of the designed slot-type antenna.…”

Section: Slot-type Doppler Radar Antenna Designmentioning

confidence: 99%

Numerical Study on the Feasibility of a 24 GHz ISM-Band Doppler Radar Antenna for Near-Field Sensing of Human Respiration in Electromagnetic Aspects

Park

Kim

et al. 2020

Applied Sciences

Self Cite

View full text Add to dashboard Cite

The feasibility study of a 24 GHz industrial, scientific, and medical (ISM) band Doppler radar antenna in electromagnetic aspects is numerically performed for near-field sensing of human respiration. The Doppler radar antenna consists of a transmitting (Tx) antenna and a receiving (Rx) antenna close to the human body for a wearable device. The designed slot-type Doppler radar antenna is embedded between an RO4350B superstrate and an FR-4 substrate. To obtain the higher radiation pattern of the antenna towards the human body, a ground plane reflector is placed underneath the substrate. The measured −10 dB reflection coefficient (S11) bandwidth is 23.74 to 25.56 GHz and the mutual coupling (S21) between Tx and Rx antennas is lower than −30 dB at target frequencies. The Doppler radar performance of the proposed Doppler radar antenna is performed numerically by investigating the signal returned from the human body. The Doppler effect due to human respiration is investigated through the I/Q and arctangent demodulation of the returned signal. According to the results, the phase variation of the returned signal is proportional to the displacement of the body surface, which is about 0.8 rad in accordance with 1 mm displacement. The numerical experiments indicate that the proposed Doppler radar antenna can be used for near-field sensing of human respiration in electromagnetic aspects.

show abstract

Section: Slot-type Doppler Radar Antenna Designmentioning

confidence: 99%

Numerical Study on the Feasibility of a 24 GHz ISM-Band Doppler Radar Antenna for Near-Field Sensing of Human Respiration in Electromagnetic Aspects

Park

Kim

et al. 2020

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…Step 3 shows the bow-tie antenna with a meandered slot. Using a slot on radiator is a commonly used method to achieve dual band [40][41][42][43][44][45][46]. Typically, the slot length is approximately between quarter to half wavelength.…”

Section: Antenna Configuration and Designmentioning

confidence: 99%

Compact Dual-Band On-Body Near Field Antenna With Reflector for Measuring Deep Core Temperature

et al. 2023

View full text Add to dashboard Cite

Human deep core temperature is a vital health condition parameter. Human body temperature change begins from the deep core followed by change in skin temperature. Measuring deep core temperature is the first action for rapid detection of health condition. Infrared thermometer can measure temperature; however, the only measures the skin temperature. The use of microwave radiometer for measuring deep core temperature has garnered attention. The antenna, an important component of the microwave radiometer, has rarely been focused upon in studies on measurement of deep core temperature. This study proposed compact dual-band on-body near field antenna with a reflector for measuring deep core temperature using a microwave radiometer. The proposed antenna size is 13 mm × 13 mm with a 20 mm × 20 mm reflector 3 mm above the radiator. The proposed antenna was simulated and designed on a full 3D body model and simplified flat phantom and measured on real human wrist. It achieved sufficient bandwidth and volume loss density can be used in microwave radiometers for measuring deep core temperature.INDEX TERMS Deep core temperature measurement, dual-band antenna, on-body antenna, sim4life

show abstract

“…However, traditional monopole antennas of the types widely used on warships have several disadvantages when mounted on the face of an integrated mast, such as their high-profile and weight issues [7][8][9][10]. Various antennas have been developed to realize low-profile [11][12][13][14][15][16][17][18][19][20]. For low-profile, the antenna is designed as a loop-type structure or with high permittivity and/or permeability materials.…”

Section: Introductionmentioning

confidence: 99%

A Low-Profile Ferrite Dipole VHF Antenna for Integrated Mast Applications

et al. 2020

View full text Add to dashboard Cite

In this paper, an extremely low-profile ferrite dipole antenna operating on the VHF band (30–300 MHz) is proposed. The design antenna consists of 44 plate-type ferrite cells arranged into two stacked ferrite layers: a bottom ferrite layer with 2 × 12 grid cells and a top ferrite layer with 2 × 10 grid cells. The antenna is excited by an electric loop feeding structure and maximum gain performance is achieved when the loop feeding structure has five loops. To validate the performance of the proposed antenna, an antenna prototype is fabricated and tested at an outdoor range. The antenna weighs 1.45 kg and has electrical dimensions of approximately 0.0636 × 0.0112 × 0.0008 λ L 3 at the lowest operating frequency of 30 MHz. The measured realized gain varies from −31.48 to −2.44 dBi within the VHF band. Reasonable agreement is also obtained between the measurement and simulation results. To assess the performance of the proposed antenna, it was mounted on the integrated mast of an offshore patrol vessel (OPV) model. The antenna on the OPV was also simulated and the results discussed.

show abstract

Design of a Short/Open-Ended Slot Antenna with Capacitive Coupling Feed Strips for Hepta-Band Mobile Application

Cited by 9 publications

References 10 publications

Numerical Study on the Feasibility of a 24 GHz ISM-Band Doppler Radar Antenna for Near-Field Sensing of Human Respiration in Electromagnetic Aspects

Numerical Study on the Feasibility of a 24 GHz ISM-Band Doppler Radar Antenna for Near-Field Sensing of Human Respiration in Electromagnetic Aspects

Compact Dual-Band On-Body Near Field Antenna With Reflector for Measuring Deep Core Temperature

A Low-Profile Ferrite Dipole VHF Antenna for Integrated Mast Applications

Contact Info

Product

Resources

About