Tae Hwan Jang

A Wideband Aperture Efficient 60-GHz Series-Fed E-Shaped Patch Antenna Array With Copolarized Parasitic Patches

A novel series-fed E-shaped patch antenna array with copolarized parasitic patches for enhanced aperture efficiency at 60-GHz unlicensed wideband applications is proposed. The additional radiation from the inserted copolarized parasitic patches between series-fed patches improves the gain flatness remarkably as well as the gain and aperture efficiency, because of the offset resonant frequency. The four-array antenna with parasitic patches presents 0.8-dB gain flatness over the whole 57-66 GHz unlicensed band, 14.5 dBi peak gain, and 63.6% aperture efficiency while that without parasitic patches shows 1.4-dB flatness, 13.4 dBi peak gain, and 49.2% aperture efficiency, without any change in the antenna size,

Bond-wire interconnected 60-GHz low-profile series fed E-shaped patch array with parasitic patches

6.0\times 14.7\times 0.25

Low-profile wideband E-shaped patch antenna for 60GHz Communication

mm2.

High-speed and low-power OOK CMOS transmitter and receiver for wireless chip-to-chip communication

In this paper, bond-wire interconnected 60-GHz low-profile 4-element series fed E-shaped patch antenna array with parasitic patches is presented for practical use. The proposed antenna shows 14.5dBi peak realized gain, 14GHz 3-dB gain bandwidth, and 10GHz impedance bandwidth. The proposed antenna with bond-wire interconnect can provide 14.2dBi peak realized gain, 14GHz 3-dB gain bandwidth, and 14GHz impedance bandwidth, and this band fully covers the 60–GHz ISM band. Although the proposed antenna interconnected to CMOS chip with bond-wire, the radiation pattern was not distorted at all.

A 120 GHz wideband low-power down converter for wireless chip-to-chip communication

This paper presents a low profile, wideband E-shaped patch antenna for a 60 GHz communication system. Two slots are placed into the antenna to provide wide-band characteristics. The proposed antenna can provide a peak gain of 9.2 dBi with 22.5% of 3-dB gain bandwidth and 22% of wide impedance bandwidth. The simulated and measured radiation pattern is also presented.

A 60-GHz low-profile, wide-band, and high-gain E-shaped patch array with parasitic patches

This paper presents a high-speed and low-power on-off keying (OOK) transmitter and receiver for wireless chip-to-chip communication implemented in 65 nm CMOS. These direct-conversion transmitter and non-coherent receiver operate with 80 GHz carrier frequency. The transmitter consists of the current-reused modulator and the 80 GHz push-push VCO for low power consumption, and the receiver consists of the wideband low-noise amplifier and gain-boosting demodulator for wide bandwidth. The transmitter and receiver consume 18 mW and 46 mW, respectively, and achieve 12 Gbps wireless data transmission over 1.2 cm distance with the bit error rate less than 10-11 for 27-1 pseudorandom binary sequence. As a result, the transmitter and receiver achieve 4.5 pJ/bit, which is the lowest bit-energy efficiency among the state-of-the-art works.