CN204333184U

CN204333184U - Based on the compact bimodulus microstrip filter of E type resonator and T-shaped feeder line

Info

Publication number: CN204333184U
Application number: CN201420818644.7U
Authority: CN
Inventors: 孙照清; 陶旭辉; 赵永生
Original assignee: Harbin Feiyu Technology Co Ltd
Current assignee: Harbin Feiyu Technology Co Ltd
Priority date: 2014-12-21
Filing date: 2014-12-21
Publication date: 2015-05-13
Anticipated expiration: 2024-12-21

Abstract

The utility model discloses a kind of novel compact bimodulus microstrip filter based on E type resonator and T-shaped feeder line, comprise and be formed at dielectric-slab (8), metal micro-strip paster (9) and metal ground plate (7), the top of dielectric-slab (8) is metal micro-strip paster (9), the below of dielectric-slab (8) is metal ground plate (7), described metal micro-strip paster to be slotted resonator (2) by E type resonator (1) and E type, and two T-shaped feeder lines (3,4) form.The utility model has compact conformation, and size is little, easily processes good wave filtering effect, and makes the features such as low price, the double-mode double-band Wide stop bands filter that the scope of application is wider.

Description

Based on the compact bimodulus microstrip filter of E type resonator and T-shaped feeder line

Technical field

The utility model relates to the compact bimodulus microstrip filter based on E type resonator and T-shaped feeder line, E type resonator is utilized to produce strange mould and even mould, make use of T-shaped feeder line to be coupled two resonators to realize double frequency response, two narrow passband central frequencies are respectively 1.8GHz and 2.4GHz.The advantage of this filter is, filter is compact, low insertion loss and efficient filtering characteristic.Due to the characteristic that these are good, this filter is more suitable in modern wireless communication systems.There is higher practical value.

Background technology

The many passbands, compact etc. of develop rapidly to microwave device of Wireless microwave communication system propose requirements at the higher level, such as all frequency range functional modules that GSM, CDMA and ISM are open are concentrated on identical platform, demand radio frequency (RF) equipment is operated in multiple different, the frequency band be separated, so that user can access each service in multi mode terminal or terminal, in order to meet the requirement that this many passbands are integrated, there is the design upsurge of dual-passband microwave device, as antenna, RECTIFYING ANTENNA, coupler, band pass filter etc.The utility model, by E type resonator and T-shaped feeder line, have devised a compact double-mode double-band filter.In fact, each dual-mode resonator can be used as double tunning resonant circuit.Therefore, for specifying the quantity of the resonator needed for equivalent properties filter to reduce to half, like this with regard to the compact layout of filter, so the Miniaturization Design being applied as microwave device of these structures has made favorable attributes.

Double-mode double-band filter generally has three kinds of typical methods for designing, one method utilizes bimodulus step impedance resonator (SIRS), in this case, second passband is actually a frequency response of dual-mode resonator, can be adjusted by the structural parameters of SIR.Second method uses multilayer technique, and use multilayer technique, double-mode double-band band-pass filter has two dual-mode resonators.Each dual-mode resonator works alone in its respective frequency, and each dual-mode resonator corresponds to a passband of double frequency filter.By suitably adjusting these two resonators and feeder line double frequency filter realizes compact double-mode double-band filter.Based on a similar idea, an annular dual-mode resonator is suggested.There is provided enough coupling to these two passbands, by air bridge technology, two feeder lines are placed in the middle of resonator.Recently, in order to simplify, make design more applicable Luo, S and Zhu, L proposed double-mode double-band filter at plane form in 2009.

HFSS simulation result shows that two passbands of filter lay respectively at 1.8GHz and 2.4GHz, minimum insertion loss is 1.08db and 1.42db relative to lower passband and upper passband respectively, therefore, this filter has a very low insertion loss, and well compactedness and selectivity.

Utility model content

The utility model utilizes E type resonator and T-shaped feeder line to form many transmission zeros outward two passbands, thus greatly improve the selectivity of filter, its objective is to design a kind of compact conformation performance excellent, usage range is compact double-mode double-band filter widely.

The technical scheme that the utility model adopts:

Based on the compact bimodulus microstrip filter of E type resonator and T-shaped feeder line, comprise dielectric-slab (8), metal micro-strip paster (9) and metal ground plate (7).

The described compact bimodulus microstrip filter based on E type resonator and T-shaped feeder line, it is characterized in that: the top of dielectric-slab (8) is metal micro-strip paster (9), the below of dielectric-slab (8) is metal ground plate (7).

The described compact bimodulus microstrip filter based on E type resonator and T-shaped feeder line, it is characterized in that: metal micro-strip paster (9) is by E type resonator (1) and E type fluting resonator (2), and two T-shaped feeder lines (3,4) compositions.What E type fluting resonator (2) was opened is vee gutter.

The described compact bimodulus microstrip filter based on E type resonator and T-shaped feeder line, is characterized in that: two T-shaped feeder lines (3,4), can obtain two transmission zeros at high frequency band by the size changing T-shaped feeder line.

This utility model filter has following characteristic and advantage relative to existing filter:

Compact conformation, size are little, are easy to processing, and make low price.

This filter has two E type resonators.

The centre frequency of two passbands can be regulated respectively by the size changing E type resonator.

This filter has two E type resonators and structure is simple.

Two zero points of transmission can be produced in passband by the size changing T-shaped feeder line.

Accompanying drawing explanation

Fig. 1 is the basic structure stereogram with compact double-mode double-band filter described in the utility model;

Fig. 2 is the basic structure front view with compact double-mode double-band filter described in the utility model;

Fig. 3 is the end view with compact double-mode double-band filter described in the utility model;

Fig. 4 is the analogous diagram with compact double-mode double-band filter described in the utility model;

Embodiment

In recent years, multimode resonance starts to be applied in the design of microstrip bandpass filter, and this type filter makes full use of the characteristic presenting multiple mode of resonance in passband, realizes multi-mode resonant filter and has many passbands Wide stop bands performance.Compared with other dual-passband Wide stop bands filter, the compact conformation of this filter, is easy to processing, applied widely, is used widely in wireless technology.The utility model utilizes two E type resonators and two T-shaped feeder lines and resonator to carry out being coupled the response realized in two passbands, devises a kind of compact double-mode double-band filter.

Specifically utility model is described in more detail below in conjunction with accompanying drawing:

As shown in Figure 1, described in the utility model have the dielectric-slab manufacture that compact double-mode double-band filter adopts two-sided copper foil covered.Wherein, dielectric-slab upper surface is metal micro-strip paster (9), and the lower surface of dielectric-slab is metal ground plate (7).Described metal micro-strip paster to be slotted resonator (1) and E type resonator (2) by E type, and two T-shaped feeder lines (3) and (4) form.

In Fig. 2, (5) and (6) are feed port, and its port is wide can obtain 2mm by the calculation of parameter such as dielectric constant (2) and medium thickness of slab (0.7874mm).

This filter is made up of two E type resonators (1) and (2) and two T-shaped feeder lines (5) and (6), and each E type resonator is made up of the step combed resonator that is positioned at center open stub other.

The centre frequency of two passbands can be regulated respectively by the size changing E type fluting resonator (1) and E type resonator (2).

By this structure different parameters, the characteristic realizing double-mode double-band Wide stop bands is set, along with some structural parameters (size of E type resonator dimensions and T-shaped feeder line of filter, the dielectric constant of dielectric-slab) change, the passband bandwidth of this compact double-mode double-band filter is in change, and center frequency point is also in change.

Claims

1., based on the compact bimodulus microstrip filter of E type resonator and T-shaped feeder line, comprise dielectric-slab (8), metal micro-strip paster (9) and metal ground plate (7).

2. the compact bimodulus microstrip filter based on E type resonator and T-shaped feeder line according to claim 1, it is characterized in that: the top of dielectric-slab (8) is metal micro-strip paster (9), the below of dielectric-slab (8) is metal ground plate (7).

3. the compact bimodulus microstrip filter based on E type resonator and T-shaped feeder line according to claim 1, it is characterized in that: metal micro-strip paster (9) is by E type resonator (1) and E type fluting resonator (2), and two T-shaped feeder line (3,4) compositions, what E type fluting resonator (2) was opened is vee gutter.

4. according to claim 1 based on the compact bimodulus microstrip filter of E type resonator and T-shaped feeder line, it is characterized in that, two T-shaped feeder lines (3,4), two transmission zeros can be obtained at high frequency band by the size changing T-shaped feeder line.