A Coaxial Line to Post-Wall Waveguide Transition for a Cost-Effective Transformer between a RF-Device and a Planar Slot-Array Antenna in 60-GHz Band

Kai, Tomoaki; Katou, Yusuke; Hirokawa, Jiro; Ando, Makoto; Nakano, Hiroshi; Hirachi, Yasutake

doi:10.1093/ietcom/e89-b.5.1646

Cited by 27 publications

(12 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The coax-to-SIW transitions with an inductive matching via and asymmetric diaphragm have been invented for application to antenna feeding networks [15], [16]. In order to overcome the narrow bandwidth, the discontinuous width of the SIW for dual resonance was applied.…”

Section: F Wideband Coax-to-siw Transition Design and Analysismentioning

confidence: 99%

A Series Slot Array Antenna for 45$^{\circ}$-Inclined Linear Polarization With SIW Technology

Kim

Chung

Park

et al. 2012

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

The design method for a standing-wave series slot array antenna with 45 -inclined linear polarization in the Ka-band is presented. The proposed 16 8 planar slot array antenna consisted of arrays with alternating reactance slot pairs that could achieve impedance matching and uniform field excitation, simultaneously. Furthermore, the grating lobes were effectively suppressed with the help of these radiating units due to the one-half guided wavelength slot spacing. An equivalent circuit analysis was done to evaluate the input impedances of the radiating and feeding lines with the impedance recursive formulas as well as the mode voltages of the radiating slot elements. In addition, a wideband transition with a 30.13% bandwidth under the criteria of less than VSWR 1.5:1 was presented to provide the necessary power with the minimal reflection and to prevent the distortion of the radiation patterns. The proposed planar slot array antenna occupied an aperture area of 57.4 51.6 mm. The measured bandwidth, gain, and efficiency were 990 MHz (2.88%), 24.3 dBi, and 53.7%, respectively. Furthermore, the side lobe levels (SLLs) were verified for each cutting plane with and , respectively. The proposed antenna structure was achieved with a substrate integrated waveguide (SIW) with the low costs and lightweight features.Index Terms-Alternating reactance slot pair, slot array antenna, substrate integrated waveguide (SIW) technology.

show abstract

Section: F Wideband Coax-to-siw Transition Design and Analysismentioning

confidence: 99%

A Series Slot Array Antenna for 45$^{\circ}$-Inclined Linear Polarization With SIW Technology

Kim

Chung

Park

et al. 2012

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

“…(The interval between the pin and terminal was set to about a quarter-wavelength so that the wave reflected by the terminal would become in-phase with the wave propagating toward the antenna aperture directly from the pin.) The center pin was inserted in the substrate about 0.8 mm, so it did not contact the metal plate of the rear side and wide impedance matching was expected [18].…”

Section: B Numbermentioning

confidence: 99%

Gain Enhancement of H-Plane Sectoral Post-Wall Horn Antenna by Connecting Tapered Slots for Millimeter-Wave Communication

Iigusa

Sato

et al. 2012

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

We propose a millimeter-wave antenna to serve as an element antenna for a multi-sector switched-beam antenna, which can be fed by a post-wall waveguide. Several tapered slot antennas are connected to an aperture of an H-plane sectoral post-wall horn antenna whose radiation pattern is narrowed in the H-plane to further narrow the pattern in the E-plane. Moreover, the aperture of each tapered slot antenna is loaded with a dielectric to increase the gain. We designed an antenna whose gain is over 16 dBi in the frequency band of 57-66 GHz. The wideband property is experimentally examined.Index Terms-Millimeter wave, post-wall, horn antenna, tapered slot, wideband

show abstract

“…Structure parameters in the optimization are the cavity size and the width of the inductive window. Figure 4 shows the comparison of the frequency characteristics between the designed transition and the conventional transition using short-ended straight post [1]. The designed structure is also shown in the inset of Fig.…”

Section: Design Examplementioning

confidence: 99%

“…Millimeter-wave components using a post-wall waveguide have been studied because they are easily fabricated in a printed-circuit board [1]. One of them is the transition from a coaxial line to post-wall waveguide.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Bandwidth enhancement of coaxial line to post-wall waveguide transition using short-ended straight post in 60-GHz band

Luo

Ohira

Miura

et al. 2008

2008 Asia-Pacific Microwave Conference

View full text Add to dashboard Cite

IntroductionFor high-speed broadband wireless communication systems, the unlicensed frequency band of 60 GHz is utilized. Millimeter-wave components using a post-wall waveguide have been studied because they are easily fabricated in a printed-circuit board [1]. One of them is the transition from a coaxial line to post-wall waveguide. Conventional transitions have wide frequency band by exploiting tapered or open-ended post as the center conductor from the coaxial line. However they are difficult to fabricate in a thin dielectric substrate board due to three-dimensional structure. On the other hand, a transition using short-ended straight post is easy to fabricate; however, it has a limited bandwidth [1]. To overcome this problem, a new technique realizing wide frequency band with simple structure is required. This paper introduces a dual-resonance technique to enhance the bandwidth of a transition using short-ended straight post structure. In our technique, dual resonance is achieved by using two cavity resonators. To confirm our technique, numerical study is performed to show that two resonant frequencies can be controlled by tuning the lengths of the cavities. Using our bandwidth enhancement technique, a transition with straight short-ended post is designed for the waveguide slot-array antenna at 60 GHz [2]. The effectiveness of our technique is evaluated by comparing the frequency characteristics of our designed transition with those of the conventional one with the short-ended straight post. Bandwidth Enhancement TechniqueThe structure of the transition is shown in Fig. 1. In order to achieve wide bandwidth, we propose a dual-resonance technique by using two cavity resonators with width of w c , and length of l 1 and l 2 . The short-ended straight post with diameter of d is connected to the inner conductor of the coaxial line. The second cavity and the output waveguide with width of w g are connected via inductive window with width of w i . They are formed in a dielectric substrate with a relative permittivity of ε r and thickness of t.The principle of our technique can be explained by using the equivalent circuit as shown in Fig. 2. Two cavities are represented by two transmission lines having characteristic impedances Z 1 and Z 2 , respectively. The T-junction with the short-ended straight post can be expressed by three-port network K 1 , where the impedance of input coaxial port is Z 0 =50 ohm. The inductive window can be expressed by two-port network K 2 , where the impedance of output waveguide port is Z wg . The straight post connected to the center conductor of the coaxial line has two functions. One function is impedance matching between coaxial line with Z 0 and waveguides with Z 1 and Z 2 . The other is impedance inverter K 1 between two cavity resonators unlike conventional transitions. Therefore our transition realizes two resonances, resulting in wider bandwidth than conventional transition using straight post with one resonance. Dual Resonance Behavior978-1-4244-2642-3/08/$25.00 ©2008 IEEE To co...

show abstract

A Coaxial Line to Post-Wall Waveguide Transition for a Cost-Effective Transformer between a RF-Device and a Planar Slot-Array Antenna in 60-GHz Band

Cited by 27 publications

References 11 publications

A Series Slot Array Antenna for 45$^{\circ}$-Inclined Linear Polarization With SIW Technology

A Series Slot Array Antenna for 45$^{\circ}$-Inclined Linear Polarization With SIW Technology

Gain Enhancement of H-Plane Sectoral Post-Wall Horn Antenna by Connecting Tapered Slots for Millimeter-Wave Communication

Bandwidth enhancement of coaxial line to post-wall waveguide transition using short-ended straight post in 60-GHz band

Contact Info

Product

Resources

About