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This paper presents a compact wideband rat-race hybrid composed of composite right/left-handed transmission lines (CRLH-TLs). Using CRLH-TLs with phase delays of −90 degrees and a right-handed transmission line (RH-TL) with 90 degrees at a design frequency, a relative bandwidth of about 36 % can be obtained at the design frequency of 4 GHz. Furthermore, size reduction of about 60 % can be simultaneously...
This paper presents a compact wideband rat-race hybrid composed of composite right/left-handed transmission lines (CRLH-TLs). Using CRLH-TLs with phase delays of −90 degrees and a right-handed transmission line (RH-TL) with 90 degrees at a design frequency, a relative bandwidth of about 36 % can be obtained at the design frequency of 4 GHz. Furthermore, size reduction of about 60 % can be simultaneously...
This paper presents a compact wideband rat-race hybrid composed of composite right/left-handed transmission lines (CRLH-TLs). Using CRLH-TLs with phase delays of −90 degrees and a right-handed transmission line (RH-TL) with 90 degrees at a design frequency, a relative bandwidth of about 36 % can be obtained at the design frequency of 4 GHz. Furthermore, size reduction of about 60 % can be simultaneously...
This paper presents a compact wideband ratrace hybrid composed of composite right/left-handed transmission lines (CRLH-TLs). Using CRLH-TLs with phase delays of −90 degrees and a right-handed transmission line (RH-TL) with 90 degrees at a design frequency, a relative bandwidth of about 36 % can be obtained at the design frequency of 4 GHz. Furthermore, size reduction of about 60 % can be simultaneously...
This paper presents a compact wideband rat-race hybrid composed of composite right/left-handed transmission lines (CRLH-TLs). Using CRLH-TLs with phase delays of −90 degrees and a right-handed transmission line (RH-TL) with 90 degrees at a design frequency, a relative bandwidth of about 36 % can be obtained at the design frequency of 4 GHz. Furthermore, size reduction of about 60 % can be simultaneously...
This paper presents an experimental investigation on the wideband intermodulation distortion compensation characteristics of a 3.5-GHz feed-forward power amplifier for mobile base stations. The fabricated 3.5-GHz band 140-W class feed-forward power amplifier employing gallium nitride high electron mobility transistors (GaN HEMTs) achieves the intermodulation distortion compensation bandwidth of 160...
This paper describes a frequency band extension method using side information for narrowband speech coded using G.711 codec. The proposed method is based on a band extension method proposed by Kataoka et al., which uses 600 bit/s for conveying side information for band extension. One drawback of Kataoka's method is its computational cost. As we have been developed a data hiding method that enables...
A 40-Gb/s receiver module with an InAlAs waveguide avalanche photodiode has developed for the first time. We have achieved the minimum received power of -18 dBm, which is the highest sensitivity ever reported without fiber amplifiers
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