• Title/Summary/Keyword: Harmonic Mixer

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Design and Implementation of a Near Zero IF Sub-harmonic Cascode FET Mixer for 2.4 GHz WLL Base-Station (Near Zero IF를 갖는 2.4 GHz WLL 기지국용 하모닉 Cascode FET 혼합기 설계 및 제작)

  • Lee, Hyok;Jeong, Youn-Suk;Kim, Jeong-Pyo;Choi, Jea-Hoon
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.14 no.5
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    • pp.472-478
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    • 2003
  • In this paper, a near zero If mixer was designed in cascode structure by using two single-gate FETs. Since it is driven by the second order harmonic of LO signal, a sub-harmonic cascode FET mixer has good LO-RF port isolation characteristic. In order to solve DC offset of a homodyne system, near zero If is used instead of zero If and the mixer is driven by sub-harmonic of LO signal. As RF input power was -30 dBm and LO power was 6 dBm, the designed mixer had 6.7 dB conversion gain, 8.4 dB noise figure, 31.5 dB LO-RF port isolation, -1.9 dBm lIP3 and -2.8 dBm IIP2.

A Ka-band Harmonic Miter Design Using Multiplier Theory (체배기 이론을 이용한 Ka-대역 고조파 믹서 설계)

  • Go Min-Ho;Kang Suk-Youb;Park Hyo-Dal
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.30 no.11A
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    • pp.1104-1109
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    • 2005
  • In this paper, a Ka-band harmonic mixer is designed and fabricated on the base of the multiplier theory that there is a bias point to maximize the third harmonic order($3f_{LO}$) with respect to a fundamental LO frequency($f_{LO}$), which can make the high-order mixing element($f_{RF}{\pm}3f_{LO}$) to be greater than other mixing elements, Pumping a RF frequency($f_{RF}$) and LO frequency($f_{LO}$). The harmonic mixer by the proposed design method is fabricated by using a commercial GaAs MESFET device with a plastic package and overcome these disadvantages that a conventional mixer in Ka-band suffer from a high cost, inefficient productivity and circuit complexity. The harmonic mixer have a -10 dB conversion loss at the IF Sequency($3f_{LO}-f_{RF}$=1.0GHz) by selecting a gate bias voltage for the maximum third-order LO harmonic element($3f_{LO}$=34.5 GHz) as pumping LO frequency($f_{LO}$=11.5 GHz) With respect to RF Sequency ($f_{RF}$=33.5GHz)

A Dual-Mode Mixer for Multi-Band Radar Signal Reception (다중 대역 레이더 신호 수신을 위한 이중 모드 주파수 혼합기)

  • Go, Min-Ho;Kim, Hyoung-Joo;Nah, Sun-Phil;Kim, Jae-Hyun
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.24 no.11
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    • pp.1047-1054
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    • 2013
  • In this paper, we propose a dual-mode mixer to have multi-band radar signal receiver to be compact. The proposed mixer using a anti-parallel diode is operated as a fundamental mixer or sub-harmonic mixer with respect to a control voltage. A fundamental mixer with a control voltage show a conversion loss of -10 dB, 1dB compression point of 2 dBm at X-band. On the other hand, it is performed as a sub-harmonic mixer with a conversion loss of -10 dB, 1 dB compression point of 2 dBm at K-band.

Design and Fabrication of Direct Conversion RF Module using Even Harmonic Mixer for 2-4GHz ISM band (Even Harmonic Mixer를 이용한 2.4GHz ISM band용 Direct Conversion방식의 RF Module 설계 및 제작)

  • 이주갑;윤영섭;최현철
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 2001.11a
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    • pp.222-226
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    • 2001
  • In this paper, 2.4GHz RF Module using Even Harmonic Mixer(EHM) was designed and fabricated for Direct conversion(DC) system. By minimizing performance degradation of DC system with DC offset and LO radiation, the capability of minimization and one chip solution in wireless system was proposed. The designed EHM using anti-parallel diode pair represented 9dB conversion loss and about -60dBm 2LO leakage radiation in RF port, and output reflection and reverse transmission characteristic of low noise amplifier was improved. So superior DC offset suppression characteristic is expected. RF Module which consists of EHM, LNA, RF amplifier, Frequency synthesizer and Duplexer was designed and fabricated.

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Design of a RF Front-End for 2.45GHz Band using Sub-harmonic Active Mixer (Sub-harmonic 능동형 혼합기를 이용한 2.45GHz 직접변환 수신기용 RF Front-End 설계 방법에 관한 연구)

  • Lim, Tae-Seo;Ko, Jae-Hyeong;Jung, Hyo-Bin;Kim, Hyeong-Seok
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.7
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    • pp.1235-1240
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    • 2008
  • In this paper, we presented an active RFID system in 2.45GHz range including LNA, Mixer and gain block. And in this work, a link budget model for RFID applications are proposed. We describe the detailed design and implementation of our system. Our components in RFID system has features such as low Noise Figure, reliable energy budget, and standard compliance with ISO 18000-4. Our receiver is effective for development and evaluation of prototype applications because of the flexibility of the design hardware. So, our platform will be suitable for versatile item management applications.

Low IF Resistive FET Mixer for the 4-Ch DBF Receiver with LNA (LNA를 포함하는 4채널 DBF 수신기용 Low IF Resistive FET 믹서)

  • 민경식;고지원;박진생
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 2002.11a
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    • pp.16-20
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    • 2002
  • This paper describes the resistive FET mixer with low IF for the 4-Ch DBF(Digital Beam Forming) receiver with LNA(Low Noise Amplifier). This DBF receiver based on the direct conversion method is generally suitable for high-speed wireless mobile communications. A radio frequency(RF), a local oscillator(LO) and an intermediate frequency(IF) considered in this research are 2.09 ㎓, 2.08 ㎓ and 10㎒, respectively. The RF input power, LO input power and Vgs are used -10㏈m, 6㏈m and -0.4 V, respectively. In the 4-Ch resistive FET mixer with LNA, the measured IF and harmonic components of 10㎒, 20㎒, 2.09㎓ and 4.17㎓ are about -12.5 ㏈m, -57㏈m, -40㏈m and -54㏈m, respectively. The IF output power observed at each channel of 10㎒ is about -12.5㏈m and it is higher 27.5 ㏈m than the maximum harmonic component of 2.09㎓. Each IF output spectrum of the 4-Ch is observed almost same value and it shows a good agreement with the prediction.

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Design of Microwave Direct Conversion Receiver Using Sub-Harmonics Pumped Ring Mixer (SHP 링혼합기를 이용한 마이크로파 직접변환 수신기 설계)

  • Kim, Kab-Ki;Kim, Han-Suk;Yoo, Hong-Gil;Lee, Jong-Arc
    • Journal of IKEEE
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    • v.3 no.1 s.4
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    • pp.69-78
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    • 1999
  • In this paper, direct conversion receiver was designed to even harmonic anti-paralled diode pair ring mixer. Using a second harmonic component of LO instead of LO signal and RF signal are mixed by SHP(Sub Harmonic Pumped) mixer with anti-parallel diode pair. Canceling the harmonics of LO signal in ring mixer, SHP mixer using anti-parallel diode pair could mostly reduce the radiation of LO signal through a input port the most, good isolation characteristic, and low spurious characteristic by LO signal was shown over broad band. The produced SHP mixer showed LO/IF, RF/IF and LO/RF isolation was 24.6dB,36.2dB and 22.5dB respectively. And conversion loss was measured 15.6dB, IF output -35.6dBm with -20dBm RF input and 5.5dBm LO signal. 1dB compression point of If signal, in respect to RF signal, was found at the 0dbm RF signal.

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Design of 5.8 GHz Wireless LAN Sub Harmonics Pumped Mixer Using Anti Parallel Diode Pair (APDP를 이용한 5.8GHz 무선 랜용 서브 하모닉 혼합기의 설계)

  • Yoo, Hong-Gil;Jang, Seok-Hwan;Kang, Jeong-Jin;Lee, Jong-Arc
    • Journal of IKEEE
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    • v.8 no.1 s.14
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    • pp.79-85
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    • 2004
  • In this paper, Sub harmonic mixer using anti-parallel diode pair is designed for 5.8 GHz Wireless LAN. Conventional mixers mix LO with RF and obtain IF signal from the difference between LO and RF. As frequency increase, LO signal is required increasing LO power, better phase noise, stable LO. But, using APDP, the SHP mixer mix the harmonics of LO signal. Therefore, Sub harmonic mixer is advantage that necessary LO signal frequency was used to operate the 1/2. When LO power is 3 dBm, the conversion loss of manufactured SHP mixer is 12.83 dB. The isolation of LO/IF, 2LO/IF, RF/IF and LO/RF is 39.17 dB, 58 dB, 34 dB, 67.9 dB. And IIP3 is 8 dBm.

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A New Compact Double Conversion Gate Mixer using a Half-LO Frequency

  • Lee, Jae-Ryong;Yun, Sang-Won
    • Journal of electromagnetic engineering and science
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    • v.2 no.1
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    • pp.56-58
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    • 2002
  • In this paper, the double conversion gate mixer using a half-LO frequency is described at 25 GHz band. The proposed mixer uses two HEMTs excited by a single LO signal of half-LO frequency in order to generate the second IF signal. That is, the LO signal having the half-LO frequency is only fed into the gate of the first HEMT mixer as a normal gate mixer. The LO signal through the first mixer is find into the second mixer The proposed miler requires not only half of the normal LO frequency, but also lower LO power than the conventional subharmonically pumped milers. Over the bandwidth of 500 MHz at 24.5 GHz, the conversion gain is 2.5 dB, the noise figure is 9 dB, and the isolation between RF and LO port is 32 dB when the LO poller is 0 dBm at 12.65 GHz.

Design for the Low If Resistive FET Mixer for the 4-Ch DBF Receiver

  • Ko, Jee-Won;Min, Kyeong-Sik;Arai, Hiroyuki
    • Journal of electromagnetic engineering and science
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    • v.2 no.2
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    • pp.117-123
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    • 2002
  • This paper describes the design for the resistive FET mixer with low If for the 4-Ch DBF(Digital Beam Forming) receiver This DBF receiver based on the direct conversion method is generally suitable for high-speed wireless mobile communications. A radio frequency(RF), a local oscillator(LO) and an intermediate frequency(If) considered in this research are 2.09 GHz, 2.08 CHz and 10 MHz, respectively. This mixer is composed of band pass filter, a low pass filter and a DC bias circuit. Super low noise HJ FET of NE3210S01 is considered in design. The RE input power, LO input power and Vcs are used -10 dBm, 6 dBm and -0.4 V, respectively. In the 4-Ch resistive FET mixer, the measured If and harmonic components of 10 MHe, 20 MHz and 2.087 CHz are about -19.2 dBm, -66 dBm and -48 dBm, respectively The If output power observed at each channel of 10 MHz is about -19.2 dBm and it is higher 28.8 dBm than the maximum harmonic component of 2.087 CHz. Each If output spectrum of the 4-Ch is observed almost same value and it shows a good agreement with the prediction.